Added components to article

lib/dto/component.dart

@@ -0,0 +1,23 @@
+import 'package:json_annotation/json_annotation.dart';
+
+part 'component.g.dart';
+
+@JsonSerializable(fieldRename: FieldRename.snake)
+class ComponentDTO {
+  ComponentDTO({
+    required this.articleNr,
+    required this.name,
+    required this.quantity,
+    required this.pos,
+  });
+
+  String articleNr;
+  String name;
+  String quantity;
+  String pos;
+
+  factory ComponentDTO.fromJson(Map<String, dynamic> json) =>
+      _$ComponentDTOFromJson(json);
+
+  Map<dynamic, dynamic> toJson() => _$ComponentDTOToJson(this);
+}