feat: implement user authentication and dashboard

Adds a complete user authentication system and a protected dashboard.

- Implements JWT-based authentication using ElysiaJS.
- Integrates Prisma for database access and user management.
- Creates a login page and protected routes for the dashboard.
- Adds a dashboard layout with pages for API key management.
- Includes necessary UI components from Mantine.

src/App.tsx

@@ -1,11 +1,14 @@
 
 import '@mantine/core/styles.css';
+import '@mantine/notifications/styles.css';
+import { Notifications } from '@mantine/notifications';
 
 import { MantineProvider } from '@mantine/core';
 import AppRoutes from './AppRoutes';
 
 export function App() {
   return <MantineProvider>
+    <Notifications />
     <AppRoutes />
   </MantineProvider>;
 }