add carton editor for mix carton

lib/domain/entities/carton.dart

@@ -37,6 +37,7 @@ class Carton {
   String? cartonSizeID;
   String? cartonSizeName;
   double cartonWeight;
+  bool isSelected;
 
   int rate;
   int weight;
@@ -158,7 +159,8 @@ class Carton {
       this.mixBoxType,
       this.mixCartons = const [],
       this.mixCartonIDs = const [],
-      this.cartonWeight =0});
+      this.cartonWeight =0,
+      this.isSelected = false});
 
   Map<String, dynamic> toMap() {
     List _cargoTypes = cargoTypes.map((c) => c.toMap()).toList();

lib/domain/entities/fcs_shipment.dart

@@ -80,4 +80,10 @@ class FcsShipment {
         fcsShipment.port != this.port ||
         fcsShipment.destination != this.destination;
   }
+
+  @override
+  bool operator ==(Object other) => other is FcsShipment && other.id == id;
+
+  @override
+  int get hashCode => id.hashCode;
 }