Added package management

LiteCharms.Features/ShoppingCarts/Commands/AddPackageToShoppingCartCommand.cs

@@ -0,0 +1,25 @@
+namespace LiteCharms.Features.ShoppingCarts.Commands;
+
+public class AddPackageToShoppingCartCommand : IRequest<Result>
+{
+    public Guid ShoppingCartId { get; set; }
+
+    public Guid PackageId { get; set; }
+
+    private AddPackageToShoppingCartCommand(Guid shoppingCartId, Guid packageId)
+    {
+        ShoppingCartId = shoppingCartId;
+        PackageId = packageId;
+    }
+
+    public static AddPackageToShoppingCartCommand Create(Guid shoppingCartId, Guid packageId)
+    {
+        if (shoppingCartId == Guid.Empty)
+            throw new ArgumentException($"Shopping cart ID is required", nameof(shoppingCartId));
+
+        if (packageId == Guid.Empty)
+            throw new ArgumentException($"Package ID is required", nameof(packageId));
+
+        return new(shoppingCartId, packageId);
+    }
+}