add support for userdev launch in ide

add template for user plugins

CringePlugins.MSBuild/CringePlugins.MSBuild.csproj

@@ -0,0 +1,33 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>netstandard2.0</TargetFramework>
+        <LangVersion>latest</LangVersion>
+        <Nullable>enable</Nullable>
+        <!-- This property tells MSBuild where the root folder of the package's build assets should be. Because we are not a library package, we should not pack to 'lib'. Instead, we choose 'tasks' by convention. -->
+        <BuildOutputTargetFolder>tasks</BuildOutputTargetFolder>
+        <!-- NuGet does validation that libraries in a package are exposed as dependencies, but we _explicitly_ do not want that behavior for MSBuild tasks. They are isolated by design. Therefore we ignore this specific warning. -->
+        <NoWarn>NU5100</NoWarn>
+        <DebugType>embedded</DebugType>
+        <IsPackable>true</IsPackable>
+        <Version>1.0.0</Version>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Microsoft.Build.Utilities.Core" Version="17.0.0" PrivateAssets="all" />
+        <PackageReference Include="PolySharp" Version="1.15.0">
+          <PrivateAssets>all</PrivateAssets>
+          <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+        </PackageReference>
+    </ItemGroup>
+
+    <ItemGroup>
+      <Content Include="build\CringePlugins.MSBuild.targets">
+          <PackagePath>build\</PackagePath>
+      </Content>
+      <Content Include="build\CringePlugins.MSBuild.props">
+        <PackagePath>build\</PackagePath>
+      </Content>
+    </ItemGroup>
+
+</Project>