feat: Skip to main content shortcut and `useDocumentTitle` (#30680)

.changeset/kind-beers-share.md

apps/meteor/client/components/Page/PageHeader.tsx

apps/meteor/client/sidebar/Item/Condensed.tsx

apps/meteor/client/sidebar/Item/Extended.tsx

apps/meteor/client/sidebar/Item/Medium.tsx

apps/meteor/client/startup/unread.ts

apps/meteor/client/views/directory/DirectoryPage.tsx

...s/directory/tabs/channels/ChannelsTable/ChannelsTable.tsx

...ient/views/directory/tabs/teams/TeamsTable/TeamsTable.tsx

...ient/views/directory/tabs/users/UsersTable/UsersTable.tsx

apps/meteor/client/views/home/cards/CustomContentCard.tsx

apps/meteor/client/views/room/Header/RoomTitle.tsx

apps/meteor/client/views/root/AppLayout.tsx

apps/meteor/client/views/root/DocumentTitleWrapper.tsx

...or/client/views/root/MainLayout/AccessibilityShortcut.tsx

...meteor/client/views/root/MainLayout/LayoutWithSidebar.tsx

apps/meteor/client/views/root/hooks/useUnreadMessages.ts

apps/meteor/packages/rocketchat-i18n/i18n/en.i18n.json

apps/meteor/tests/e2e/homepage.spec.ts

packages/ui-client/src/hooks/useDocumentTitle.spec.ts