Add AI repository implementation

scribe/lib/scribe/ai/data/repository/ai_repository_impl.dart

@@ -0,0 +1,14 @@
+import '../datasource/ai_datasource.dart';
+import '../../domain/model/ai_response.dart';
+import '../../domain/repository/ai_scribe_repository.dart';
+
+class AIScribeRepositoryImpl implements AIScribeRepository {
+  final AIDataSource _dataSource;
+
+  AIScribeRepositoryImpl(this._dataSource);
+
+  @override
+  Future<AIResponse> generateText(String prompt) async {
+    return await _dataSource.request(prompt);
+  }
+}