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/lib/vacuum/access_tokens_vacuum.rb

@@ -9,10 +9,10 @@ class Vacuum::AccessTokensVacuum
   private
 
   def vacuum_revoked_access_tokens!
-    Doorkeeper::AccessToken.where('revoked_at IS NOT NULL').where('revoked_at < NOW()').delete_all
+    Doorkeeper::AccessToken.where.not(revoked_at: nil).where('revoked_at < NOW()').delete_all
   end
 
   def vacuum_revoked_access_grants!
-    Doorkeeper::AccessGrant.where('revoked_at IS NOT NULL').where('revoked_at < NOW()').delete_all
+    Doorkeeper::AccessGrant.where.not(revoked_at: nil).where('revoked_at < NOW()').delete_all
   end
 end