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/views/disputes/strikes/show.html.haml

@@ -26,7 +26,7 @@
         %p= t "user_mailer.warning.explanation.#{@strike.action}", instance: Rails.configuration.x.local_domain
 
       - unless @strike.text.blank?
-        = Formatter.instance.linkify(@strike.text)
+        = linkify(@strike.text)
 
       - if @strike.report && !@strike.report.other?
         %p