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/src/vite-env.d.ts

@@ -0,0 +1,15 @@
+/// <reference types="vite/client" />
+
+interface ImportMetaEnv {
+  readonly VITE_PB_URL: string
+}
+
+interface ImportMeta {
+  readonly env: ImportMetaEnv
+}
+
+declare module '*.vue' {
+  import type { DefineComponent } from 'vue'
+  const component: DefineComponent<{}, {}, any>
+  export default component
+}