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/javascript/shared/constants/messages.js

@@ -19,6 +19,14 @@ export const CONVERSATION_STATUS = {
   PENDING: 'pending',
   SNOOZED: 'snoozed',
 };
+
+export const CONVERSATION_PRIORITY = {
+  URGENT: 'urgent',
+  HIGH: 'high',
+  LOW: 'low',
+  MEDIUM: 'medium',
+};
+
 // Size in mega bytes
 export const MAXIMUM_FILE_UPLOAD_SIZE = 40;
 export const MAXIMUM_FILE_UPLOAD_SIZE_TWILIO_SMS_CHANNEL = 5;