feat: Migración completa de SnatchGame a Nuxt 4

- Creado nuevo proyecto Nuxt 4 con estructura app/
- Servidor Colyseus separado para evitar problemas con decoradores
- Migrado GameRoom y toda la lógica del juego
- Implementado cliente con composables useGameClient
- Panel de administración funcional
- Componentes Vue migrados (HomeScreen, GameScreen, PlayerCard, etc)
- Configuración para ejecutar ambos servidores (npm run dev:all)

nuxt-snatchgame/server/colyseus-server.ts

@@ -0,0 +1,42 @@
+import 'reflect-metadata'
+import { listen } from '@colyseus/tools'
+import { monitor } from '@colyseus/monitor'
+import { Server } from 'colyseus'
+import { WebSocketTransport } from '@colyseus/ws-transport'
+import { createServer } from 'http'
+import express from 'express'
+import cors from 'cors'
+import { GameRoom } from './rooms/GameRoom'
+
+const port = parseInt(process.env.PORT || '2567', 10)
+const app = express()
+
+// Enable CORS
+app.use(cors())
+app.use(express.json())
+
+// Create HTTP & WebSocket servers
+const server = createServer(app)
+
+const gameServer = new Server({
+  transport: new WebSocketTransport({
+    server
+  })
+})
+
+// Register GameRoom
+gameServer.define('game', GameRoom)
+  .filterBy(['gameMode'])
+  .sortBy({ clients: 1 })
+
+// Health check
+app.get('/health', (req, res) => {
+  res.json({ status: 'healthy' })
+})
+
+// Colyseus monitor
+app.use('/monitor', monitor())
+
+gameServer.listen(port)
+
+console.log(`🎮 Colyseus server is listening on ws://localhost:${port}`)