We moved away from using propTypes a long time ago

Previously, `MenuItem`'s `icon` prop accepted a string, which could be:

- the name of a registered icon
- a URL (in which case an `img` with that URL as `src` was rendered)
- the string "blank" (in which case space was added at left)

This became over-complex when migrating to use updated icon components.
Now the `icon` prop expects an `IconComponent`, but `MenuItem` also
takes a `leftChannelContent` prop. This allows consumers to set any
content in the left channel — e.g. an image instead of an icon — and
reduces the complexity of this component.

`GroupListItem` has been updated to set `leftChannelContent` as needed
instead of passing "blank" or a URL to an image as the `icon` prop.

Other components updated to provide `IconComponent`s instead of strings.

In the future, we should be able to use the `MenuCollapseIcon` instead
of rotating the `MenuExpandIcon`, but that needs some layout tuning.

Convert an `<a>` element to use the `Link` component, and make it
underlined.

Bumps [@typescript-eslint/parser](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/parser) from 5.48.0 to 5.48.1.
- [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases)
- [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/main/packages/parser/CHANGELOG.md)
- [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v5.48.1/packages/parser)

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Bumps [prettier](https://github.com/prettier/prettier) from 2.8.2 to 2.8.3.
- [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/2.8.2...2.8.3)

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- dependency-name: prettier
  dependency-type: direct:development
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Bumps [eslint-plugin-react](https://github.com/jsx-eslint/eslint-plugin-react) from 7.31.11 to 7.32.0.
- [Release notes](https://github.com/jsx-eslint/eslint-plugin-react/releases)
- [Changelog](https://github.com/jsx-eslint/eslint-plugin-react/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jsx-eslint/eslint-plugin-react/compare/v7.31.11...v7.32.0)

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  dependency-type: direct:development
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Bumps [eslint-plugin-jsx-a11y](https://github.com/jsx-eslint/eslint-plugin-jsx-a11y) from 6.6.1 to 6.7.1.
- [Release notes](https://github.com/jsx-eslint/eslint-plugin-jsx-a11y/releases)
- [Changelog](https://github.com/jsx-eslint/eslint-plugin-jsx-a11y/blob/main/CHANGELOG.md)
- [Commits](https://github.com/jsx-eslint/eslint-plugin-jsx-a11y/compare/v6.6.1...v6.7.1)

---
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  dependency-type: direct:development
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Bumps [eslint](https://github.com/eslint/eslint) from 8.29.0 to 8.32.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/main/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v8.29.0...v8.32.0)

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  dependency-type: direct:development
  update-type: version-update:semver-minor
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Bumps [commander](https://github.com/tj/commander.js) from 9.5.0 to 10.0.0.
- [Release notes](https://github.com/tj/commander.js/releases)
- [Changelog](https://github.com/tj/commander.js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/tj/commander.js/compare/v9.5.0...v10.0.0)

---
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- dependency-name: commander
  dependency-type: direct:development
  update-type: version-update:semver-major
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Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.1290.0 to 2.1295.0.
- [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/v2.1290.0...v2.1295.0)

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  dependency-type: direct:development
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Bumps [@typescript-eslint/eslint-plugin](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/eslint-plugin) from 5.48.0 to 5.48.1.
- [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases)
- [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/main/packages/eslint-plugin/CHANGELOG.md)
- [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v5.48.1/packages/eslint-plugin)

---
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Bumps [@npmcli/arborist](https://github.com/npm/cli/tree/HEAD/workspaces/arborist) from 6.1.5 to 6.1.6.
- [Release notes](https://github.com/npm/cli/releases)
- [Changelog](https://github.com/npm/cli/blob/latest/workspaces/arborist/CHANGELOG.md)
- [Commits](https://github.com/npm/cli/commits/arborist-v6.1.6/workspaces/arborist)

---
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  dependency-type: direct:development
  update-type: version-update:semver-patch
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Bumps [@babel/core](https://github.com/babel/babel/tree/HEAD/packages/babel-core) from 7.20.7 to 7.20.12.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.20.12/packages/babel-core)

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As "focusing" and "hovering" an annotation are two separate things,
rename an internal handler function that makes a thread appear
hovered.

Nothing is using these at present. The `sm` size is the same as the
`base` size and helps to show that this app's "base" font size is small.

`lg` will be used by some updated components coming from the shared
component library. The updated scale allows an interim size between
the app's (small) base font and `text-lg`.

Nothing was using the previous `xl` size.

Add `xs` as a new text size equal to the existing `sm` text size and
update components using `text-sm` to use `text-xs`.

This will allow us to change the `sm` size to be the same as the `base`
size.

Update all cases using `text-lg` to use `text-md` (a new text size).
This allows a text size between `base` and `lg`.

There are a few places in the app where we want to size things to 10px,
typically for teeny-tiny icons, but also in one case, some `<sup>` text.

This isn't really a text size, in terms of the relative text-size scale.
Remove the token from the Tailwind config and use a direct pixel size in
the one remaining usage.

In some cases icons are sized relative to local text or containers
(em-based sizing) and that's fine, but using a named text-size
utility directly on an icon can add a layer of unhelpful abstraction if
our intent is simply to size the icon to particular pixel dimensions. It
also entangles icon sizing with text sizing in an unintended way.

In cases where we want to size icons to specific dimensions,
irrespective of local text size, use size utility classes, not text-size
utility classes.

In cases where icons use em-based sizing (e.g. we want to set a text
size on a container such that descendant icons, which are sized at 1em,
have desired dimensions), use arbitrary text sizing classes (e.g.
`text-[16px]` instead of `text-lg`) to be explicit about the intent.