增加Mediat Pip特性，并用实例来做一个demo

Modules/Store.Users/Dtos/ShopRenewResponse.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Text;
 
@@ -8,6 +8,6 @@ namespace Store.Users.Contracts.Dtos
 	{
 		public string ShopId { get; set; }
 		public int ExpireTime‌ { get; set; }
-		public int UserPoints { get; set; }
+		public decimal UserPoints { get; set; }
 	}
 }