FEATURE: New 'Reviewable' model to make reviewable items generic

Includes support for flags, reviewable users and queued posts, with REST API
backwards compatibility.

Co-Authored-By: romanrizzi <romanalejandro@gmail.com>
Co-Authored-By: jjaffeux <j.jaffeux@gmail.com>

spec/support/discourse_event_helper.rb

@@ -13,6 +13,12 @@ module DiscourseEvent::TestHelper
     @events_trigger = nil
     events_trigger
   end
+
+  def track(event_type)
+    events = track_events { yield }
+    events.find { |e| e[:event_name] == event_type }
+  end
+
 end
 
 DiscourseEvent.singleton_class.prepend DiscourseEvent::TestHelper