Refactor App component styles and remove highlights section

- Updated background gradient colors for a lighter theme.
- Changed button styles to improve visibility.
- Removed the highlights section to streamline the layout.
- Adjusted text colors for better contrast and readability.

public/manifest.json

@@ -1,6 +1,6 @@
 {
-  "short_name": "TanStack App",
-  "name": "Create TanStack App Sample",
+  "short_name": "Genesis",
+  "name": "Genesis - La Salle",
   "icons": [
     {
       "src": "favicon.ico",