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-lock.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",
@@ -1051,6 +1053,15 @@
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       "license": "MIT"
     },
+    "node_modules/clsx": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmmirror.com/clsx/-/clsx-2.1.1.tgz",
+      "integrity": "sha512-eYm0QWBtUrBWZWG0d386OGAw16Z995PiOVo2B7bjWSbHedGl5e0ZWaq65kOGgUSNesEIDkB9ISbTg/JK9dhCZA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/combined-stream": {
       "version": "1.0.8",
       "resolved": "https://registry.npmmirror.com/combined-stream/-/combined-stream-1.0.8.tgz",
@@ -1774,6 +1785,35 @@
         "react": "^19.1.0"
       }
     },
+    "node_modules/react-hook-form": {
+      "version": "7.65.0",
+      "resolved": "https://registry.npmmirror.com/react-hook-form/-/react-hook-form-7.65.0.tgz",
+      "integrity": "sha512-xtOzDz063WcXvGWaHgLNrNzlsdFgtUWcb32E6WFaGTd7kPZG3EeDusjdZfUsPwKCKVXy1ZlntifaHZ4l8pAsmw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=18.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/react-hook-form"
+      },
+      "peerDependencies": {
+        "react": "^16.8.0 || ^17 || ^18 || ^19"
+      }
+    },
+    "node_modules/react-toastify": {
+      "version": "11.0.5",
+      "resolved": "https://registry.npmmirror.com/react-toastify/-/react-toastify-11.0.5.tgz",
+      "integrity": "sha512-EpqHBGvnSTtHYhCPLxML05NLY2ZX0JURbAdNYa6BUkk+amz4wbKBQvoKQAB0ardvSarUBuY4Q4s1sluAzZwkmA==",
+      "license": "MIT",
+      "dependencies": {
+        "clsx": "^2.1.1"
+      },
+      "peerDependencies": {
+        "react": "^18 || ^19",
+        "react-dom": "^18 || ^19"
+      }
+    },
     "node_modules/scheduler": {
       "version": "0.26.0",
       "resolved": "https://registry.npmmirror.com/scheduler/-/scheduler-0.26.0.tgz",