feat: add activity message for priority change (#6933)

* feat: add priority const

* feat: add toggle priority method

* feat: update controller route and specs

* refactor: status change method

* refactor: abstract label change and mute activity

* feat: add priority change_activity

* fix: interpolation for previous_changes

* refactor: reduce cognitive complexity of priority_change_activity

* refactor: move priority activity message handler to a separate module

* refactor: move typing logic to a service

* refactor: tests to reduce complexity

* fix: typo

* fix: constants

* fix: priority conditions

* fix: add a response

* fix: argument destructuring in I18n.t

---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/models/conversation.rb

@@ -149,6 +149,11 @@ class Conversation < ApplicationRecord
     save
   end
 
+  def toggle_priority(priority = nil)
+    self.priority = priority.presence
+    save
+  end
+
   def bot_handoff!
     open!
     dispatcher_dispatch(CONVERSATION_BOT_HANDOFF)