The Guest implementation no longer has any logic which is specific to a
particular document type (PDF, HTML etc.). These details are now all
handled by the Integration implementation returned by
`createIntegration`.

This commit refactors the Guest tests to use a single Integration fake
instead of using different fakes to simulate HTML and PDF documents.

Move the logic for determining which document type/viewer integration to
create out of the annotator entry point and Guest and into a
`createIntegration` factory method in annotator/integrations/index.js

This reduces the number of places that need to change when we add new
integrations, and puts the logic for determining whether a particular
integration can be used in the current environment alongside the
corresponding implementation.

Because of the sometimes-arcane nature of grid layouts, it is sometimes
necessary to apply definite width values on grid areas (versus `auto`)
to prevent content from escaping.

This fixes a situation in which very long unbroken quoted excerpts could
blow out the column width in the Notebook.

See https://css-tricks.com/preventing-a-grid-blowout/

This was created to simulate a scenario in VitalSource's book reader,
but they changed their reader so that it no longer uses a tall frame.

This is a prerequisite for moving to a modern ES-module oriented module
bundler such as Rollup.

There is one remaining import ('preact/debug') which was not converted
because that is conditional, and top-level `import` statements can't be
conditional. That might need to use either `import(...)` or a different
approach.

This required adapting pattern library import paths due to changes in
https://github.com/hypothesis/frontend-shared/pull/200.

Remove logic that is no longer required with the current Hypothesis
client and PDF.js version.

See https://github.com/hypothesis/browser-extension/pull/658.

`String.protoype.substr` is a deprecated method (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/substr). It is recommended to be replaced by `String.prototype.substring` method (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/substring).

The pattern library no longer serves by default at `/ui-playground`, so
we need to set a `baseURL`.

Bumps [mocha](https://github.com/mochajs/mocha) from 9.1.1 to 9.1.2.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mochajs/mocha/compare/v9.1.1...v9.1.2)

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Bumps [@sentry/browser](https://github.com/getsentry/sentry-javascript) from 6.12.0 to 6.13.2.
- [Release notes](https://github.com/getsentry/sentry-javascript/releases)
- [Changelog](https://github.com/getsentry/sentry-javascript/blob/master/CHANGELOG.md)
- [Commits](https://github.com/getsentry/sentry-javascript/compare/6.12.0...6.13.2)

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Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 10.3.4 to 10.3.6.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/autoprefixer/compare/10.3.4...10.3.6)

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Bumps [dompurify](https://github.com/cure53/DOMPurify) from 2.3.2 to 2.3.3.
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](https://github.com/cure53/DOMPurify/compare/2.3.2...2.3.3)

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Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.991.0 to 2.995.0.
- [Release notes](https://github.com/aws/aws-sdk-js/releases)
- [Changelog](https://github.com/aws/aws-sdk-js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-js/compare/v2.991.0...v2.995.0)

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Bumps [terser](https://github.com/terser/terser) from 5.8.0 to 5.9.0.
- [Release notes](https://github.com/terser/terser/releases)
- [Changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/terser/terser/compare/v5.8.0...v5.9.0)

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Bumps [@octokit/rest](https://github.com/octokit/rest.js) from 18.10.0 to 18.11.1.
- [Release notes](https://github.com/octokit/rest.js/releases)
- [Commits](https://github.com/octokit/rest.js/compare/v18.10.0...v18.11.1)

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Bumps [sass](https://github.com/sass/dart-sass) from 1.41.1 to 1.42.1.
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/main/CHANGELOG.md)
- [Commits](https://github.com/sass/dart-sass/compare/1.41.1...1.42.1)

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Bumps [puppeteer](https://github.com/puppeteer/puppeteer) from 10.2.0 to 10.4.0.
- [Release notes](https://github.com/puppeteer/puppeteer/releases)
- [Changelog](https://github.com/puppeteer/puppeteer/blob/main/CHANGELOG.md)
- [Commits](https://github.com/puppeteer/puppeteer/compare/v10.2.0...v10.4.0)

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Bumps [core-js](https://github.com/zloirock/core-js) from 3.18.0 to 3.18.1.
- [Release notes](https://github.com/zloirock/core-js/releases)
- [Changelog](https://github.com/zloirock/core-js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/zloirock/core-js/compare/v3.18.0...v3.18.1)

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Bumps [eslint-plugin-react](https://github.com/yannickcr/eslint-plugin-react) from 7.25.3 to 7.26.0.
- [Release notes](https://github.com/yannickcr/eslint-plugin-react/releases)
- [Changelog](https://github.com/yannickcr/eslint-plugin-react/blob/master/CHANGELOG.md)
- [Commits](https://github.com/yannickcr/eslint-plugin-react/compare/v7.25.3...v7.26.0)

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Bumps [postcss](https://github.com/postcss/postcss) from 8.3.6 to 8.3.8.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.3.6...8.3.8)

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I used these commands (Mac version):

```
% ag -0 -l '@.+Object' | xargs -0 sed -ri '' -e '/@/s/(.*{.*)Object(.*})/\1object\2/'
% ag -0 -l '@.+object\.' | xargs -0 sed -ri '' -e '/@/s/object\.</Record</'
% ag -0 -l '@.+object<' | xargs -0 sed -ri '' -e '/@/s/object</Record</'
```

https://github.com/prettier/prettier/issues/11482

Bumps [prettier](https://github.com/prettier/prettier) from 2.4.0 to 2.4.1.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/main/CHANGELOG.md)
- [Commits](https://github.com/prettier/prettier/compare/2.4.0...2.4.1)

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Bumps [core-js](https://github.com/zloirock/core-js) from 3.17.3 to 3.18.0.
- [Release notes](https://github.com/zloirock/core-js/releases)
- [Changelog](https://github.com/zloirock/core-js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/zloirock/core-js/compare/v3.17.3...v3.18.0)

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Bumps [eslint-plugin-react](https://github.com/yannickcr/eslint-plugin-react) from 7.25.1 to 7.25.3.
- [Release notes](https://github.com/yannickcr/eslint-plugin-react/releases)
- [Changelog](https://github.com/yannickcr/eslint-plugin-react/blob/master/CHANGELOG.md)
- [Commits](https://github.com/yannickcr/eslint-plugin-react/compare/v7.25.1...v7.25.3)

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Bumps [@hypothesis/frontend-shared](https://github.com/hypothesis/frontend-shared) from 3.9.0 to 3.10.0.
- [Release notes](https://github.com/hypothesis/frontend-shared/releases)
- [Changelog](https://github.com/hypothesis/frontend-shared/blob/main/CHANGELOG.md)
- [Commits](https://github.com/hypothesis/frontend-shared/compare/v3.9.0...v3.10.0)

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Bumps [dompurify](https://github.com/cure53/DOMPurify) from 2.3.1 to 2.3.2.
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](https://github.com/cure53/DOMPurify/compare/2.3.1...2.3.2)

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Bumps [terser](https://github.com/terser/terser) from 5.7.2 to 5.8.0.
- [Release notes](https://github.com/terser/terser/releases)
- [Changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/terser/terser/compare/v5.7.2...v5.8.0)

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Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.987.0 to 2.991.0.
- [Release notes](https://github.com/aws/aws-sdk-js/releases)
- [Changelog](https://github.com/aws/aws-sdk-js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-js/compare/v2.987.0...v2.991.0)

---
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Bumps [sass](https://github.com/sass/dart-sass) from 1.39.2 to 1.41.1.
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/main/CHANGELOG.md)
- [Commits](https://github.com/sass/dart-sass/compare/1.39.2...1.41.1)

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* check that the iframe's `src` element is not 'about:blank'.
* use EventTarget class and fake DOM element for tests
* fix typos

I removed the `/* istanbul ignore test */` and created a facade to
emulate and iframe for testing.

In certain situations, the logic to check when the iframe's document is
ready didn't work as expected. The reason for that is that browsers
create an initial blank document before the actual document loads.
This blank document has a `readyState` of 'complete' in Safari and
Chrome and of 'uninitialized' in Firefox. This blank document can be
mistaken by the final document. I was able to reproduce a situation
where the Hypothesis client was injected into the blank document. Then,
the blank document was replaced by the actual document and the
Hypothesis client was not not longer embedded.

In addition, this commit:

* renames `frame` to `iframe` (only in the test)
* renames `_handledFrames` to _annotatableFrames`
* removes `isAccessible` (no longer neede)

Add commas for readability
Co-authored-by: Lyza Gardner <439947+lyzadanger@users.noreply.github.com>

When the sidebar is closed or there is not enough room to show the
sidebar alongside the PDF content, reserve space for the sidebar's
toolbar and bucket bar. This fixes an issue where the sidebar's controls
would overlap the document's scrollbar, making scrolling the PDF less
convenient, especially in long documents.

This also removes the need for some CSS overrides that reposition
elements in PDF.js's toolbar. By ensuring that the `<body>` does not
overlap the sidebar controls, the PDF.js toolbar which is contained
within the body doesn't either.

Fixes #3759

This is no longer needed after the `Record<K, V>` => `Map<K, V>` change.