【调整】获取商品分类功能，从原先的只获取二级分类，改成递归获取无限级分类。

CoreCms.Net.Model/ViewModels/DTO/WxGoodCategoryDto.cs

@@ -35,29 +35,6 @@ namespace CoreCms.Net.Model.ViewModels.DTO
         /// </summary>
         public string imageUrl { get; set; }
 
-        public List<WxGoodCategoryChild> child { get; set; }
-    }
-
-    public class WxGoodCategoryChild
-    {
-        /// <summary>
-        ///     序列
-        /// </summary>
-        public int id { get; set; }
-
-        /// <summary>
-        ///     标题
-        /// </summary>
-        public string name { get; set; }
-
-        /// <summary>
-        ///     排序
-        /// </summary>
-        public int sort { get; set; }
-
-        /// <summary>
-        ///     图片地址
-        /// </summary>
-        public string imageUrl { get; set; }
+        public List<WxGoodCategoryDto>? child { get; set; }
     }
 }