first commit

lib/model/add_to_cart_model.dart

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+class SaleCartModel {
+  SaleCartModel({
+    required this.productId,
+    this.productCode,
+    this.productType,
+    required this.batchName,
+    required this.stockId,
+    this.productName,
+    this.unitPrice,
+    this.quantity = 1,
+    this.itemCartIndex = -1,
+    this.stock,
+    this.productPurchasePrice,
+    this.lossProfit,
+    this.discountAmount,
+  });
+
+  num productId;
+  num stockId;
+  String batchName;
+  String? productType;
+  String? productCode;
+  String? productName;
+  num? unitPrice;
+  num? productPurchasePrice;
+  num quantity = 1;
+  int itemCartIndex;
+  num? stock;
+  num? lossProfit;
+  num? discountAmount;
+}