搭建基础接口，新增采购入库单、采购订单接口

Gatedge.K3Cloud.Utils/Model/K3Request/BaseRequest.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Gatedge.K3Cloud.Utils.Model.K3Request
+{
+    public class BaseRequest
+    {
+        public int Version { get; set; } = 7;
+    }
+}