Include nuget package reference assets in VSIX

IncludePackageReferenceInVSIX.targets

<Project>
  <Target Name="IncludePackageReferenceInVSIX"
          Condition="$(CI)"
          Inputs="@(PackageReference -> WithMetadataValue('IncludeInVSIX', 'true'))"
          Outputs="%(PackageReference.Identity)"
          DependsOnTargets="ResolvePackageAssets"
          AfterTargets="ResolveReferences">
    <PropertyGroup>
      <IncludeInVSIXPackageId>%(PackageReference.Identity)</IncludeInVSIXPackageId>
    </PropertyGroup>
    <ItemGroup>
      <VSIXSourceItem Include="@(RuntimeCopyLocalItems);@(RuntimeTargetsCopyLocalItems)"
                      Condition="'%(NuGetPackageId)' == '$(IncludeInVSIXPackageId)'" />
    </ItemGroup>
  </Target>
</Project>

Sample.csproj

<Project>
  <ItemGroup>
    <PackageReference Include="Foo" Version="1.0.0" IncludeInVSIX="true" />
  </ItemGroup>
</Project>