Add AI text state

scribe/lib/scribe/ai/domain/state/generate_ai_text_state.dart

@@ -0,0 +1,17 @@
+import 'package:core/core.dart';
+import '../model/ai_response.dart';
+
+class GenerateAITextLoading extends LoadingState {}
+
+class GenerateAITextSuccess extends UIState {
+  final AIResponse response;
+
+  GenerateAITextSuccess(this.response);
+
+  @override
+  List<Object?> get props => [response];
+}
+
+class GenerateAITextFailure extends FeatureFailure {
+  GenerateAITextFailure(dynamic exception) : super(exception: exception);
+}