Switch to Hilla for UI

frontend/util/auth.ts

@@ -0,0 +1,10 @@
+import {configureAuth} from '@hilla/react-auth';
+import {UserEndpoint} from 'Frontend/generated/endpoints';
+
+// Configure auth to use `UserInfoService.getUserInfo`
+const auth = configureAuth(UserEndpoint.getUserInfo);
+
+// Export auth provider and useAuth hook, which are automatically
+// typed to the result of `UserInfoService.getUserInfo`
+export const useAuth = auth.useAuth;
+export const AuthProvider = auth.AuthProvider;