feat: Attachments view (#7156)

* feat: Attachments view with key shortcuts and dynamically updates when user delete or sent new attachments

---------

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

app/javascript/dashboard/api/specs/inbox/conversation.spec.js

@@ -210,5 +210,12 @@ describe('#ConversationAPI', () => {
         { params: { page: payload.page } }
       );
     });
+
+    it('#getAllAttachments', () => {
+      conversationAPI.getAllAttachments(1);
+      expect(context.axiosMock.get).toHaveBeenCalledWith(
+        '/api/v1/conversations/1/attachments'
+      );
+    });
   });
 });