refactor: migrate project to Vue 3 with TypeScript and Vite

- Updated index.html to use Vite and Vue 3.
- Changed package.json to reflect new dependencies and build scripts.
- Removed old favicon.svg and added new vite.svg.
- Deleted unused PWA assets configuration.
- Created new App.vue component and HelloWorld.vue component.
- Added Vue logo and Vite logo to App.vue.
- Removed old JavaScript files and replaced with TypeScript files.
- Updated styles in style.css for better layout.
- Added TypeScript configuration files for better type checking.
- Migrated Vite configuration from JavaScript to TypeScript.

frontend/vite.config.ts

@@ -0,0 +1,11 @@
+import vue from "@vitejs/plugin-vue";
+import { defineConfig } from "vite";
+import { VitePWA } from "vite-plugin-pwa";
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [
+    vue(),
+    VitePWA({ registerType: "autoUpdate", devOptions: { enabled: true } }),
+  ],
+});