Ban mesage

- Create type message could be use to send private message at any user
- Create SendMessageUser message
- Add sound when user receive ban message

front/src/Connexion/ConnexionModels.ts

@@ -27,6 +27,7 @@ export enum EventMessage{
     STOP_GLOBAL_MESSAGE = "stop-global-message",
 
     TELEPORT = "teleport",
+    USER_MESSAGE = "user-message",
     START_JITSI_ROOM = "start-jitsi-room",
 }