Frontend first draft

frontend/pshared/lib/data/dto/storable.dart

@@ -0,0 +1,20 @@
+import 'package:json_annotation/json_annotation.dart';
+
+part 'storable.g.dart';
+
+
+@JsonSerializable()
+class StorableDTO {
+  final String id;
+  final DateTime createdAt;
+  final DateTime updatedAt;
+
+  const StorableDTO({
+    required this.id,
+    required this.createdAt,
+    required this.updatedAt,
+  });
+
+  factory StorableDTO.fromJson(Map<String, dynamic> json) => _$StorableDTOFromJson(json);
+  Map<String, dynamic> toJson() => _$StorableDTOToJson(this);
+}