Feature: Typing Indicator on widget and dashboard (#811)

* Adds typing indicator for widget
* typing indicator for agents in dashboard

Co-authored-by: Pranav Raj Sreepuram <pranavrajs@gmail.com>

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

@@ -33,6 +33,12 @@ class ConversationApi extends ApiClient {
       agent_last_seen_at: lastSeen,
     });
   }
+
+  toggleTyping({ conversationId, status }) {
+    return axios.post(`${this.url}/${conversationId}/toggle_typing_status`, {
+      typing_status: status,
+    });
+  }
 }
 
 export default new ConversationApi();