Add include for readme.txt file

Author: Rosuavio

Microsoft.Toolkit.Uwp.UI.Controls/Microsoft.Toolkit.Uwp.UI.Controls.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="MSBuild.Sdk.Extras">
+<Project Sdk="MSBuild.Sdk.Extras">
   <PropertyGroup>
     <TargetFrameworks>uap10.0.17763</TargetFrameworks>
     <Title>Windows Community Toolkit Controls</Title>
@@ -9,8 +9,9 @@
     </Description>
     <IncludeBuildOutput>false</IncludeBuildOutput>
   </PropertyGroup>
-
+  
   <ItemGroup>
+    <None Include="$(MSBuildThisFileDirectory)readme.txt" Pack="true" PackagePath="\"/>
     <ProjectReference Include="..\Microsoft.Toolkit.Uwp.UI.Controls.Primitives\Microsoft.Toolkit.Uwp.UI.Controls.Primitives.csproj" />
     <ProjectReference Include="..\Microsoft.Toolkit.Uwp.UI.Controls.Core\Microsoft.Toolkit.Uwp.UI.Controls.Core.csproj" />
     <ProjectReference Include="..\Microsoft.Toolkit.Uwp.UI.Controls.Media\Microsoft.Toolkit.Uwp.UI.Controls.Media.csproj" />