Add notification settings page

This commit adds a new page for configuring notification settings.

src/App.tsx

@@ -9,6 +9,7 @@ import Transactions from "./pages/Transactions";
 import Analytics from "./pages/Analytics";
 import Settings from "./pages/Settings";
 import ProfileManagement from "./pages/ProfileManagement";
+import NotificationSettings from "./pages/NotificationSettings";
 import NotFound from "./pages/NotFound";
 import Login from "./pages/Login";
 import Register from "./pages/Register";
@@ -28,6 +29,7 @@ const App = () => (
           <Route path="/analytics" element={<Analytics />} />
           <Route path="/settings" element={<Settings />} />
           <Route path="/profile-management" element={<ProfileManagement />} />
+          <Route path="/notification-settings" element={<NotificationSettings />} />
           <Route path="/login" element={<Login />} />
           <Route path="/register" element={<Register />} />
           <Route path="/forgot-password" element={<ForgotPassword />} />