feat: delete item

lib/presentation/home/bloc/checkout/checkout_event.dart

@@ -7,6 +7,8 @@ class CheckoutEvent with _$CheckoutEvent {
   const factory CheckoutEvent.addItem(Product product) = _AddItem;
   //remove item
   const factory CheckoutEvent.removeItem(Product product) = _RemoveItem;
+  // Delete Item
+  const factory CheckoutEvent.deleteItem(Product product) = _DeleteItem;
 
   //add discount
   const factory CheckoutEvent.addDiscount(Discount discount) = _AddDiscount;
@@ -20,13 +22,15 @@ class CheckoutEvent with _$CheckoutEvent {
   //remove tax
   const factory CheckoutEvent.removeTax() = _RemoveTax;
   //remove service charge
-  const factory CheckoutEvent.removeServiceCharge() = _RemoveServiceCharge;    
+  const factory CheckoutEvent.removeServiceCharge() = _RemoveServiceCharge;
 
   //update order type
-  const factory CheckoutEvent.updateOrderType(OrderType orderType) = _UpdateOrderType;
+  const factory CheckoutEvent.updateOrderType(OrderType orderType) =
+      _UpdateOrderType;
 
   //update item notes
-  const factory CheckoutEvent.updateItemNotes(Product product, String notes) = _UpdateItemNotes;
+  const factory CheckoutEvent.updateItemNotes(Product product, String notes) =
+      _UpdateItemNotes;
 
   //save draft order
   const factory CheckoutEvent.saveDraftOrder(