feat: initialize React app with TanStack Router and Vitest for testing

- Added App component with basic structure and styling.
- Included CSS for app layout and animations.
- Integrated TanStack Router for routing management.
- Set up Vitest for testing with a basic test case for the App component.
- Added logo SVG for branding.
- Configured Vite for development with React and TanStack Devtools.
- Created reportWebVitals utility for performance measurement.
- Established global styles in styles.css.

my-app/.vscode/settings.json

@@ -0,0 +1,11 @@
+{
+  "files.watcherExclude": {
+    "**/routeTree.gen.ts": true
+  },
+  "search.exclude": {
+    "**/routeTree.gen.ts": true
+  },
+  "files.readonlyInclude": {
+    "**/routeTree.gen.ts": true
+  }
+}