TF-2802 Create calendar event accept interactor

lib/features/email/domain/state/calendar_event_accept_state.dart

@@ -0,0 +1,12 @@
+import 'package:tmail_ui_user/features/email/domain/state/calendar_event_reply_state.dart';
+
+class CalendarEventAccepting extends CalendarEventReplying {}
+
+class CalendarEventAccepted extends CalendarEventReplySuccess {
+  
+  CalendarEventAccepted(super.calendarEventAcceptResponse);
+}
+
+class CalendarEventAcceptFailure extends CalendarEventReplyFailure {
+  CalendarEventAcceptFailure({super.exception});
+}

lib/features/email/domain/state/calendar_event_reply_state.dart

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+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+import 'package:jmap_dart_client/jmap/core/method/response/calendar_event_reply_response.dart';
+
+class CalendarEventReplying extends LoadingState {}
+
+class CalendarEventReplySuccess extends UIState {
+  final CalendarEventReplyResponse calendarEventReplyResponse;
+
+  CalendarEventReplySuccess(this.calendarEventReplyResponse);
+
+  @override
+  List<Object?> get props => [calendarEventReplyResponse];
+}
+
+class CalendarEventReplyFailure extends FeatureFailure {
+  CalendarEventReplyFailure({super.exception});
+}

lib/features/email/domain/usecases/calendar_event_accept_interactor.dart

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+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+import 'package:dartz/dartz.dart';
+import 'package:jmap_dart_client/jmap/account_id.dart';
+import 'package:jmap_dart_client/jmap/core/id.dart';
+import 'package:tmail_ui_user/features/email/domain/repository/calendar_event_repository.dart';
+import 'package:tmail_ui_user/features/email/domain/state/calendar_event_accept_state.dart';
+
+class AcceptCalendarEventInteractor {
+  AcceptCalendarEventInteractor(this._calendarEventRepository);
+
+  final CalendarEventRepository _calendarEventRepository;
+
+  Stream<Either<Failure, Success>> execute(
+    AccountId accountId,
+    Set<Id> blobIds
+  ) async* {
+    try {
+      yield Right(CalendarEventAccepting());
+      final result = await _calendarEventRepository.acceptEventInvitation(accountId, blobIds);
+      yield Right(CalendarEventAccepted(result));
+    } catch (e) {
+      yield Left(CalendarEventAcceptFailure(exception: e));
+    }
+  }
+}