refactor(web): migrate frontend to Tailwind CSS and Vike SSR

- Replace Mantine UI components with Tailwind CSS v4
- Migrate from static HTML to Vike-based SSR framework
- Disable SSR for game page (Emscripten requires browser environment)
- Simplify Emscripten loading to avoid hydration conflicts
- Remove Tailwind download logic from web.build.ts
- Add package manager lockfiles for reproducible builds
- Update .gitignore for node_modules and build artifacts

web/pages/+config.ts

@@ -12,6 +12,6 @@ export default {
   // https://vike.dev/head-tags
   title: "Pac-Man",
   description: "A Pac-Man game built with Rust and React.",
-
+  prerender: true,
   extends: vikeReact,
 } satisfies Config;