feat: change total to amount

lib/domain/order/entities/order_entity.dart

@@ -159,3 +159,12 @@ class PaymentOrderItem with _$PaymentOrderItem {
     updatedAt: '',
   );
 }
+
+/// Ringkasan order untuk kartu summary: jumlah order + total nominalnya.
+@freezed
+class OrderTotal with _$OrderTotal {
+  const factory OrderTotal({required int count, required int amount}) =
+      _OrderTotal;
+
+  factory OrderTotal.empty() => const OrderTotal(count: 0, amount: 0);
+}