refactor: Migrate frontend to use Vite and update testing framework

### Summary of Changes
- Replaced `react-query` with `@tanstack/react-query` in `package.json` and updated related imports.
- Updated frontend CI workflow to use `vitest` for testing instead of Jest, modifying test commands accordingly.
- Removed the `App.js`, `Dashboard.js`, `Settings.js`, and other component files, transitioning to a new structure.
- Enhanced error handling in the `useServiceStatus` hook to provide more informative error messages.

### Expected Results
- Improved performance and modernized the frontend build process with Vite.
- Streamlined testing setup with `vitest`, enhancing test execution speed and reliability.
- Increased clarity and maintainability of the codebase by adhering to clean code principles and removing unused components.

frontend/vitest.config.js

@@ -0,0 +1,11 @@
+import { defineConfig } from 'vitest/config';
+import react from '@vitejs/plugin-react';
+
+export default defineConfig({
+  plugins: [react()],
+  test: {
+    environment: 'jsdom',
+    setupFiles: ['./src/setupTests.js'],
+    globals: true,
+  },
+});