Prevent crash when clients disconnects

src/controller/game.py

@@ -24,6 +24,7 @@ class GameController(GameControllerInterface):
         client = ClientController(self, websocket)
         self.clients.append(client)
         await asyncio.gather(client.listen(), callback())
+        self.clients.remove(client)
 
     async def send(self, message: Message, websocket: WebSocketServerProtocol):
         await websocket.send(message.model_dump_json())