feat: add AI recommendations flow for tenders

Implement company AI onboarding/recommendation models, services, repository, and tender UI integration with supporting tests.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/data/services/model/onboarding_data/onboarding_data.g.dart

@@ -0,0 +1,13 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'onboarding_data.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+_OnboardingData _$OnboardingDataFromJson(Map<String, dynamic> json) =>
+    _OnboardingData(status: json['status'] as String?);
+
+Map<String, dynamic> _$OnboardingDataToJson(_OnboardingData instance) =>
+    <String, dynamic>{'status': instance.status};