Add drift support for web

frontend/lib/providers/auth.dart

@@ -0,0 +1,12 @@
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+import 'package:shared_models/jwt.dart';
+
+part 'auth.g.dart';
+
+@riverpod
+class JwtNotifier extends _$JwtNotifier {
+  @override
+  JWTBody? build() {
+    return null;
+  }
+}