feat: Refactor layout and add toast notifications

This commit introduces a major structural refactoring by creating a shared application layout and integrates a toast notification system.

Key changes:
- A new `layout.tsx` file now contains the common Header and Footer components, ensuring a consistent structure across all pages.
- The main `page.tsx` has been simplified to only contain its specific content, with layout elements removed.
- The `react-toastify` library has been added to provide user feedback through toast notifications.
- Custom CSS styles have been applied to the toast notifications for a branded look and feel, including different gradient backgrounds for success, error, warning, and info states.
- The `.gitignore` file was updated to explicitly track the `.env` file, likely for an example configuration.

package.json

@@ -11,7 +11,9 @@
     "axios": "^1.12.2",
     "next": "15.5.5",
     "react": "19.1.0",
-    "react-dom": "19.1.0"
+    "react-dom": "19.1.0",
+    "react-hook-form": "^7.65.0",
+    "react-toastify": "^11.0.5"
   },
   "devDependencies": {
     "@tailwindcss/postcss": "^4",