add delete message

game.events.ts

@@ -28,10 +28,12 @@ export class GameLeaveEvent {
 
 export class GameMessageEvent {
   type = 'message';
-  constructor(
+  constructor(public message: MessageResponseDTO) {
-    public gameId: number,
-    public message: MessageResponseDTO,
-  ) {
     this.message = new MessageResponseDTO(message);
   }
 }
+
+export class GameMessageDeleteEvent {
+  type = 'deleteMessage';
+  constructor(public messageId: number) {}
+}