feat: add GameGroup2 project with frontend and backend

- Add .gitignore for Node.js and PocketBase projects
- Add frontend (Vue 3 + Vite + TypeScript)
- Add backend (PocketBase)
- Add deployment scripts and Docker compose configs

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/scripts/start-dev.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+# 启动 Dev 环境
+
+cd "$(dirname "$0")/../"
+
+export $(cat .env.dev | xargs)
+
+echo "🚀 启动 Dev 环境"
+echo "📡 PocketBase: $VITE_PB_URL"
+echo "🌐 Frontend Port: $VITE_PORT"
+
+npm run dev