Merge branch 'main' into glitch-soc/merge-upstream

Conflicts:
- `README.md`:
  Upstream updated its README, while we have a completely different one.
  Kept our README.
- `app/controllers/concerns/web_app_controller_concern.rb`:
  Conflict because of glitch-soc's theming system.
  Additionally, glitch-soc has different behavior regarding moved accounts.
  Ported some of the changes, but kept our overall behavior.
- `app/javascript/packs/admin.js`:
  Code changes actually applied to `app/javascript/core/admin.js`

app/javascript/mastodon/locales/en.json

@@ -563,7 +563,7 @@
   "status.favourite": "Favourite",
   "status.filter": "Filter this post",
   "status.filtered": "Filtered",
-  "status.hide": "Hide toot",
+  "status.hide": "Hide post",
   "status.history.created": "{name} created {date}",
   "status.history.edited": "{name} edited {date}",
   "status.load_more": "Load more",