feat: integrate create flag route

lib/src/nutripatrol/create_flag_request.dart

@@ -0,0 +1,75 @@
+import 'package:json_annotation/json_annotation.dart';
+
+import '../interface/json_object.dart';
+
+part 'create_flag_request.g.dart';
+
+@JsonSerializable()
+class CreateFlagRequest extends JsonObject {
+  /// Barcode of the product.
+  @JsonKey()
+  String? barcode;
+
+  /// Type of the flag
+  @JsonKey()
+  late String type;
+
+  /// Url of the product
+  @JsonKey()
+  late String url;
+
+  /// User ID
+  @JsonKey(name: 'user_id')
+  late String userId;
+
+  /// Device ID
+  @JsonKey(name: 'device_id')
+  late String deviceId;
+
+  /// Source of the flag
+  @JsonKey()
+  late String source;
+
+  /// Confidence of the flag
+  @JsonKey()
+  double? confidence;
+
+  /// Image ID of the flag
+  @JsonKey(name: 'image_id')
+  String? imageId;
+
+  /// Flavor of the flag
+  @JsonKey()
+  late String flavor;
+
+  /// Reason for the flag
+  @JsonKey()
+  String? reason;
+
+  /// Comment associated with the flag
+  @JsonKey()
+  String? comment;
+
+  /// Created date of the flag
+  @JsonKey(name: 'created_at')
+  late DateTime createdAt;
+
+  CreateFlagRequest();
+
+  factory CreateFlagRequest.fromJson(Map<String, dynamic> json) =>
+      _$CreateFlagRequestFromJson(json);
+
+  @override
+  Map<String, dynamic> toJson() => _$CreateFlagRequestToJson(this);
+}
+
+enum NutripatrolSource {
+  @JsonValue('mobile')
+  mobile,
+
+  @JsonValue('web')
+  web,
+
+  @JsonValue('robotoff')
+  robotoff,
+}

lib/src/nutripatrol_api_client.dart

@@ -2,6 +2,7 @@ import 'dart:convert';
 
 import 'package:http/http.dart';
 import 'package:openfoodfacts/src/nutripatrol/create_flag.dart';
+import 'package:openfoodfacts/src/nutripatrol/create_flag_request.dart';
 import 'package:openfoodfacts/src/nutripatrol/get_tickets.dart';
 import 'package:openfoodfacts/src/prices/maybe_error.dart';
 import 'utils/http_helper.dart';
@@ -106,7 +107,7 @@ class NutripatrolApiClient {
   ///
   /// [flag] is the flag to create.
   static Future<MaybeError<CreateFlag>> createFlag({
-    required final CreateFlag flag,
+    required final CreateFlagRequest flag,
     final UriProductHelper uriHelper = uriHelperFoodProd,
   }) async {
     final Uri uri = getUri(