加上给 Grid 行列命名绑定的辅助方法

详细请看 [WPF 给 Grid 的辅助方法 添加行列名称绑定](https://lindexi.gitee.io/post/WPF-%E7%BB%99-Grid-%E7%9A%84%E8%BE%85%E5%8A%A9%E6%96%B9%E6%B3%95-%E6%B7%BB%E5%8A%A0%E8%A1%8C%E5%88%97%E5%90%8D%E7%A7%B0%E7%BB%91%E5%AE%9A.html )

src/Shared/HandyControl_Shared/HandyControl_Shared.projitems

@@ -141,6 +141,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\ThicknessSplitConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Extension\DependencyObjectExtension.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Extension\FrameworkElementExtension.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Tools\Extension\GridExtension.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Extension\LangExtension.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Extension\StringExtension.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Extension\ValueExtension.cs" />