feat(external_api): Expose the Etherpad SharedDocument URL

modules/API/external/external_api.js

@@ -682,6 +682,17 @@ export default class JitsiMeetExternalAPI extends EventEmitter {
         });
     }
 
+    /**
+     * Returns the Shared Document Url of the conference.
+     *
+     * @returns {Object} Rooms info.
+     */
+    async getSharedDocumentUrl() {
+        return this._transport.sendRequest({
+            name: 'get-shared-document-url'
+        });
+    }
+
     /**
      * Returns whether the conference is P2P.
      *