TF-2802 Add calendar event accept interactor to single email controller

lib/features/email/presentation/model/blob_calendar_event.dart

@@ -0,0 +1,13 @@
+import 'package:equatable/equatable.dart';
+import 'package:jmap_dart_client/jmap/core/id.dart';
+import 'package:jmap_dart_client/jmap/mail/calendar/calendar_event.dart';
+
+class BlobCalendarEvent with EquatableMixin {
+  final Id blobId;
+  final List<CalendarEvent> calendarEventList;
+
+  BlobCalendarEvent({required this.blobId, required this.calendarEventList});
+
+  @override
+  List<Object?> get props => [blobId, calendarEventList];
+}