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.

.gitea/workflows/frontend.yml

@@ -70,7 +70,7 @@ jobs:
         
     - name: Run tests
       run: |
-        npm test -- --coverage --watchAll=false --passWithNoTests --coverageReporters=lcov --coverageReporters=text --coverageReporters=html
+        npm test -- --coverage --reporter=verbose
         npm run test:coverage
         
     - name: Send results to SonarQube
@@ -91,7 +91,7 @@ jobs:
       run: |
         echo "Test results available in pipeline logs"
         echo "Coverage report: frontend/coverage/"
-        echo "Jest test results: frontend/test-results/"
+        echo "Vitest test results: frontend/test-results/"
 
   build:
     runs-on: [self-hosted]