update carton list and editor

lib/domain/entities/carton.dart

@@ -36,7 +36,7 @@ class Carton {
   String? mixCartonNumber;
   String? cartonSizeID;
   String? cartonSizeName;
-  double? cartonWeight;
+  double cartonWeight;
 
   int rate;
   int weight;
@@ -158,7 +158,7 @@ class Carton {
       this.mixBoxType,
       this.mixCartons = const [],
       this.mixCartonIDs = const [],
-      this.cartonWeight});
+      this.cartonWeight =0});
 
   Map<String, dynamic> toMap() {
     List _cargoTypes = cargoTypes.map((c) => c.toMap()).toList();