refactor(web): migrate from Vike+React to SvelteKit

- Replace Vike+React with SvelteKit for simpler SSR and routing
- Update WASM build output paths from public/ to static/
- Add wasm-opt integration for WASM size optimization
- Streamline tooling: remove ESLint, Prettier configs (use defaults)
- Move build.rs to pacman-server/ (frontend no longer needs it)

web/svelte.config.js

@@ -0,0 +1,24 @@
+import adapter from '@sveltejs/adapter-static';
+import { vitePreprocess } from '@sveltejs/vite-plugin-svelte';
+
+/** @type {import('@sveltejs/kit').Config} */
+const config = {
+	preprocess: vitePreprocess(),
+
+	kit: {
+		adapter: adapter({
+			pages: 'dist/client',
+			assets: 'dist/client',
+			fallback: undefined,
+			precompress: false,
+			strict: true
+		}),
+		// Inline CSS below 5KB for fewer requests
+		inlineStyleThreshold: 5000,
+		alias: {
+			$lib: './src/lib'
+		}
+	}
+};
+
+export default config;