feat: add Auth0 passwordless login

app/login/page.tsx

@@ -0,0 +1,8 @@
+export default function SignIn() {
+  return (
+    <div>
+      <a href='/api/auth/login'>Login</a>
+      <a href='/api/auth/logout'>Logout</a>
+    </div>
+  );
+}