feat: Ability to add label for contact page (#2350)

* feat: Ability to add label for contact page

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Pranav Raj S <pranav@chatwoot.com>
Co-authored-by: Nithin David Thomas <webofnithin@gmail.com>

app/javascript/dashboard/api/contacts.js

@@ -18,6 +18,14 @@ class ContactAPI extends ApiClient {
     return axios.get(`${this.url}/${contactId}/contactable_inboxes`);
   }
 
+  getContactLabels(contactId) {
+    return axios.get(`${this.url}/${contactId}/labels`);
+  }
+
+  updateContactLabels(contactId, labels) {
+    return axios.post(`${this.url}/${contactId}/labels`, { labels });
+  }
+
   search(search = '', page = 1, sortAttr = 'name') {
     return axios.get(
       `${this.url}/search?q=${search}&page=${page}&sort=${sortAttr}`