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/src/hooks/useServiceStatus.js

@@ -112,7 +112,7 @@ export const useSystemData = () => {
           systemStats: fallbackData.systemStats,
           services: fallbackData.services,
           events: fallbackData.events,
-          error: 'Failed to fetch data from services'
+          error: `Failed to fetch data from services: ${error.message}`
         });
       }
     };