🐞 Hotfix: Sidecar's Design issues on Small screens (#9113)

* Feature 🚀 : Ability to delete messages in chat channels

- Sending message ID to frontend
- Deleting Message
- Use pusher to delete message realtime

* Minor Bug 🐞: Show message action only for current user

- User can delete or edit their own messages

* Test cases added

* Bug 🐞: Update message id for receiver

Message id was not sent to receiver by pusher

* Refactoring🛠: Message controller refactoring

* Test Cases📝 : Specs for Delete message added

* Feature 🚀 : Ability to edit messages

* Test Cases📝 : Specs for Edit message added

* Merge conflict resolved

* Hotfix🐞: Sidecar Design issue in Mobile

Co-authored-by: Narender Singh <narender2031@gmail.com>

app/assets/stylesheets/chat.scss

@@ -298,7 +298,7 @@
     min-width: 50%;
     width: calc(100% - 16px);
     position: fixed;
-    height: calc(100% - 86px);
+    height: 100%;
     margin-left: 0;
     margin-top: 0;
   }