新增续费接口，移除旧续费API

OEM结算 增加续费返现

Store.User/Class1.cs

@@ -0,0 +1,6 @@
+namespace Store.User;
+
+public class Class1
+{
+
+}

Store.User/Store.User.csproj

@@ -0,0 +1,5 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <ItemGroup>
+    <ProjectReference Include="..\Store.Framework\Store.Framework.csproj" />
+  </ItemGroup>
+</Project>