Merge commit 'b0780cfeeda641645ea65da257a72ec507e71647' into glitch-soc/merge-upstream

Conflicts:
- `app/javascript/mastodon/load_locale.js`:
  The file moved to `app/javascript/mastodon/locales/load_locale.ts`.
  Ported the changes there and deleted `app/javascript/mastodon/load_locale.js`.
- `app/javascript/mastodon/locales/index.js`:
  The file moved to `app/javascript/mastodon/locales/index.ts`.
  Did *not* port the changes as I want to try something a bit different.

Merge commit '44cd88adc4e2f4028dcc2b08b98368f0dc90cee4' into glitch-soc/merge-upstream

Conflicts:
- `.github/dependabot.yml`:
  Updated upstream, but we've deleted it.
  Keep it deleted.
- `app/javascript/mastodon/locales/index.js`:
  Reworked upstream, but the code was mostly in
  `app/javascript/locales/index.js` in glitch-soc.
  Updated that file accordingly.
- `app/javascript/packs/public.jsx`:
  Not a real conflict, but different imports in
  glitch-soc and upstream.
- `app/views/layouts/application.html.haml`:
  Conflict due to locales loading and theme system
  discrepancies.
  Updated in our own way.
- `app/views/layouts/embedded.html.haml`:
  Conflict due to locales loading and theme system
  discrepancies.
  Updated in our own way.
- `config/webpack/generateLocalePacks.js`:
  Deleted upstream, as upstream now directly loads the
  JSON at runtime.
  Deleted as well, will switch to runtime loading in
  an upcoming commit.
- `config/webpack/shared.js`:
  Not a real conflict, but different imports in
  glitch-soc and upstream.
- `config/webpack/translationRunner.js`:
  Mostly deleted upstream, to be replaced with `formatjs-formatter.js`
  instead.
  Moved the glitch-soc logic there and deleted the file.

Fix `/share` and cleanup and reorganize frontend locale loading (#25240)

Merge pull request #2237 from ClearlyClaire/glitch-soc/merge-upstream

Merge upstream changes

Upgrade react-intl (#24906)

Merge commit 'd27216dc4616d80659c0cc5d2a55394e0e1ae874' into glitch-soc/merge-upstream

Conflicts:
- `.eslintrc.js`:
  Upstream moved a configuration block in which we had added a glitch-only
  path.
  Moved the configuration block as upstream did.
- other files:
  Upstream reordered imports, and those files had different ones.
  Kept our version and reordered imports using the same rules.

[Glitch] Use the new JSX transform everywhere

Port 8f66126b1010e0aaaa8b5f2a2f4ea8a28824e2b7 to glitch-soc

Merge pull request #2236 from ClearlyClaire/glitch-soc/merge-upstream

Merge upstream changes up to e387175fc9a3ebfd72ab45ebfe43ecfabef7b0c3

Merge commit '8d6aea33260dedeacb3d22ac1a6d2f9cc3856a5e' into glitch-soc/merge-upstream

Merge commit 'e60414792d86a99c0f401f3c1bab92ee37835d39' into glitch-soc/merge-upstream

Enforce import order with ESLint (#25096)

Upgrade to React 18 (#24916)

Add polling and automatic redirection to `/start` on email confirmation (#25013)

Merge pull request #2216 from ClearlyClaire/glitch-soc/merge-upstream

Merge upstream changes

Merge commit '6aeb162927e6f9bbfd597632a10d82d9656c2385' into glitch-soc/merge-upstream

Conflicts:
- `.github/dependabot.yml`:
  We deleted it.
  Kept it removed.
- `app/javascript/packs/public.jsx`:
  Upstream changed an import, we have slightly different ones.
  Ported upstream changes.

Merge commit 'c8181eb0a41c4f5c1655d4e400cab071aee4182a' into glitch-soc/merge-upstream

Conflicts:
- `app/javascript/packs/admin.jsx`:
  Upstream reworked imports, but we had many changes.
  Reworked imports as upstream did.
- `app/javascript/packs/public.jsx`:
  Upstream reworked imports, but we had many changes.
  Reworked imports as upstream did.

Fix javascript on moderation interface (#24933)

Rework polyfills loading (#24907)

Dont use CommonJS (`require`, `module.exports`) anywhere (#24913)

Merge pull request #2192 from ClearlyClaire/glitch-soc/merge-upstream

Merge upstream changes