feat: void page

lib/presentation/void/bloc/void_order_event.dart

@@ -0,0 +1,11 @@
+part of 'void_order_bloc.dart';
+
+@freezed
+class VoidOrderEvent with _$VoidOrderEvent {
+  const factory VoidOrderEvent.voidOrder({
+    required String orderId,
+    required String reason,
+    required String type, // "ALL" or "ITEM"
+    required List<OrderItem> orderItems,
+  }) = _VoidOrder;
+}