把一些项目移动到插件中

Plugins/Directory.Build.props

@@ -0,0 +1,8 @@
+<Project>
+  <Import Project="../Directory.Build.props" />
+  <PropertyGroup>
+    <!-- 插件生成时带齐运行依赖，复制到宿主后移除共享副本。 -->
+    <EnableDynamicLoading>true</EnableDynamicLoading>
+    <PluginDeploymentDirectory>$(StoreHostOutputPath)Plugins\$(MSBuildProjectName)\</PluginDeploymentDirectory>
+  </PropertyGroup>
+</Project>