Add API types for status and related objects (#29792)

app/serializers/rest/status_serializer.rb

@@ -3,6 +3,8 @@
 class REST::StatusSerializer < ActiveModel::Serializer
   include FormattingHelper
 
+  # Please update `app/javascript/mastodon/api_types/statuses.ts` when making changes to the attributes
+
   attributes :id, :created_at, :in_reply_to_id, :in_reply_to_account_id,
              :sensitive, :spoiler_text, :visibility, :language,
              :uri, :url, :replies_count, :reblogs_count,