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

Conflicts:
- `app/lib/formatter.rb`:
  Upstream completely refactored the formatting code and removed that file,
  while glitch-soc had code for Markdown and HTML toots.
  Took upstream code, glitch-soc changes will be re-implemented on top of the
  refactored classes in a later commit.
- `app/models/status.rb`:
  Upstream refactored status edit handling and moved code to
  `app/models/concerns/status_snapshot_concern.rb`.
  Applied glitch-soc's changes to that file.
- `app/serializers/activitypub/note_serializer.rb`:
  Not really a conflict, just a line added too close to one modified by
  glitch-soc.
  Applied upstream changes while keeping the glitch-soc-modified one.
- `app/services/update_status_service.rb`:
  Not really a conflict, upstream modified a line adjacent to one added by
  glitch-soc.
  Applied upstream changes while keeping the glitch-soc line.
- `app/views/statuses/_simple_status.html.haml`:
  Upstream refactored formatting, glitch-soc changed the markup slightly.
  Applied upstream changes.
- `spec/lib/formatter_spec.rb`:
  Upstream completely refactored the formatting code and removed that file,
  while glitch-soc had code for Markdown and HTML toots.
  Took upstream code, glitch-soc changes will be re-implemented on top of the
  refactored classes in a later commit.

app/views/admin/instances/show.html.haml

@@ -84,7 +84,8 @@
     - else
       %span.negative-hint
         = t('admin.instances.availability.failures_recorded', count: @instance.delivery_failure_tracker.days)
-        = link_to t('admin.instances.delivery.clear'), clear_delivery_errors_admin_instance_path(@instance), data: { confirm: t('admin.accounts.are_you_sure'), method: :post } unless @instance.exhausted_deliveries_days.empty?
+        %span= link_to t('admin.instances.delivery.clear'), clear_delivery_errors_admin_instance_path(@instance), data: { confirm: t('admin.accounts.are_you_sure'), method: :post } unless @instance.exhausted_deliveries_days.empty?
+        %span= link_to t('admin.instances.delivery.stop'), stop_delivery_admin_instance_path(@instance), data: { confirm: t('admin.accounts.are_you_sure'), method: :post }
 
 - if @instance.purgeable?
   %p= t('admin.instances.purge_description_html')