Refactor formatter (#17828)

* Refactor formatter

* Move custom emoji pre-rendering logic to view helpers

* Move more methods out of Formatter

* Fix code style issues

* Remove Formatter

* Add inline poll options to RSS feeds

* Remove unused helper method

* Fix code style issues

* Various fixes and improvements

* Fix test

app/helpers/routing_helper.rb

@@ -2,6 +2,7 @@
 
 module RoutingHelper
   extend ActiveSupport::Concern
+
   include Rails.application.routes.url_helpers
   include ActionView::Helpers::AssetTagHelper
   include Webpacker::Helper
@@ -22,8 +23,6 @@ module RoutingHelper
     full_asset_url(asset_pack_path(source, **options))
   end
 
-  private
-
   def use_storage?
     Rails.configuration.x.use_s3 || Rails.configuration.x.use_swift
   end