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/controllers/settings/featured_tags_controller.rb

@@ -11,7 +11,6 @@ class Settings::FeaturedTagsController < Settings::BaseController
 
   def create
     @featured_tag = current_account.featured_tags.new(featured_tag_params)
-    @featured_tag.reset_data
 
     if @featured_tag.save
       redirect_to settings_featured_tags_path