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

Conflicts:
- `README.md`:
  Minor upstream change, our README is completely different.
  Kept ours.
- `lib/tasks/assets.rake`:
  glitch-soc has extra code to deal with its theming system,
  upstream changed a line that exists in glitch-soc.
  Applied upstream changes.

app/javascript/mastodon/locales/pl.json

@@ -276,6 +276,7 @@
   "footer.keyboard_shortcuts": "Skróty klawiszowe",
   "footer.privacy_policy": "Polityka prywatności",
   "footer.source_code": "Zobacz kod źródłowy",
+  "footer.status": "Status",
   "generic.saved": "Zapisano",
   "getting_started.heading": "Rozpocznij",
   "hashtag.column_header.tag_mode.all": "i {additional}",