TF-836: Create module forward

forward/lib/forward/converter/rule_filter_id_coverter.dart

@@ -0,0 +1,13 @@
+import 'package:forward/forward/forward_id.dart';
+import 'package:jmap_dart_client/jmap/core/id.dart';
+import 'package:json_annotation/json_annotation.dart';
+
+class ForwardIdConverter implements JsonConverter<ForwardId, String> {
+  const ForwardIdConverter();
+
+  @override
+  ForwardId fromJson(String json) => ForwardId(id: Id(json));
+
+  @override
+  String toJson(ForwardId object) => object.id.value;
+}