Collaboration: Room chat

# feat
- chatting antar user
- lihat info grup
## No issue

src/util/mqtt_client.ts

@@ -1,10 +1,10 @@
 import mqtt from "mqtt";
 
-// declare global {
-//   var mqtt_client: mqtt.MqttClient;
-// }
+declare global {
+  var mqtt_client: mqtt.MqttClient;
+}
 
-// const mqtt_client =
-//   globalThis.mqtt_client || mqtt.connect("wss://io.wibudev.com");
+const mqtt_client =
+  globalThis.mqtt_client || mqtt.connect("wss://io.wibudev.com");
 
-// export default mqtt_client;
+export default mqtt_client;