Pascal case frontend-shared components

Add /components folder in frontend-shared

frontend-shared/src/test/svg-icon-test.js → frontend-shared/src/components/test/SvgIcon-test.js

 import { render } from 'preact';
 
-import { SvgIcon, availableIcons, registerIcons } from '../svg-icon';
+import { SvgIcon, availableIcons, registerIcons } from '../SvgIcon';
 
 describe('SvgIcon', () => {
   // Tests here use DOM APIs rather than Enzyme because SvgIcon uses
@@ -15,8 +15,8 @@ describe('SvgIcon', () => {
 
     registerIcons(
       {
-        'arrow-left': require('../../images/icons/arrow-left.svg'),
-        'arrow-right': require('../../images/icons/arrow-right.svg'),
+        'arrow-left': require('../../../images/icons/arrow-left.svg'),
+        'arrow-right': require('../../../images/icons/arrow-right.svg'),
       },
       { reset: true }
     );

frontend-shared/src/index.js

 // Components
-export { SvgIcon, registerIcons } from './svg-icon';
+export { SvgIcon, registerIcons } from './components/SvgIcon';
 
 // Hooks
 export { useElementShouldClose } from './hooks/use-element-should-close';