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

- `.env.production.sample`:
  Our sample config file is very different from upstream since it is much more
  complete. Upstream added documentation for a few env variables.
  Copied the new variables/documentation from upstream.
- `app/lib/feed_manager.rb`:
  Upstream added a timeline type (hashtags), while glitch-soc already had an
  extra one (direct messages). Not really a conflict but textually close
  changes.
  Ported upstream's changes.
- `app/models/custom_emoji.rb`:
  Upstream upped the custom emoji size limit, while glitch-soc had configurable
  limits.
  Upped the default limits accordingly.
- `streaming/index.js`:
  Upstream reworked how hastags were normalized. Minor conflict due to
  glitch-soc's handling of instance-local posts.
  Ported upstream's changes.

app/javascript/mastodon/locales/defaultMessages.json

@@ -612,6 +612,10 @@
         "defaultMessage": "Copy link to status",
         "id": "status.copy"
       },
+      {
+        "defaultMessage": "Hide toot",
+        "id": "status.hide"
+      },
       {
         "defaultMessage": "Block domain {domain}",
         "id": "account.block_domain"
@@ -678,6 +682,10 @@
         "defaultMessage": "Filtered",
         "id": "status.filtered"
       },
+      {
+        "defaultMessage": "Show anyway",
+        "id": "status.show_filter_reason"
+      },
       {
         "defaultMessage": "Pinned post",
         "id": "status.pinned"