docs: add package readme to nuget for projects

Author: DennisDyallo

Yubico.Core/src/Yubico.Core.csproj

@@ -41,6 +41,7 @@ limitations under the License. -->
       Yubico.Core is a support library used by other .NET Yubico libraries. You should likely never need to consume this package directly, as it will be included with other libraries.
     </Description>
     <PackageIcon>yubico-circle-y-mark.png</PackageIcon>
+    <PackageReadmeFile>README.md</PackageReadmeFile>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
     <IncludeSymbols>true</IncludeSymbols>
@@ -72,6 +73,7 @@ limitations under the License. -->
     </EmbeddedResource>
 
     <None Include="..\..\LICENSE.txt" Pack="true" PackagePath="" />
+    <None Include="..\..\README.md" Pack="true" PackagePath="" />
     <None Include="..\..\yubico-circle-y-mark.png" Pack="true" PackagePath="" />
     <None Include="..\..\Yubico.NET.SDK.snk">
       <Link>Yubico.NET.SDK.snk</Link>

Yubico.DotNetPolyfills/src/Yubico.DotNetPolyfills.csproj

@@ -30,6 +30,7 @@ limitations under the License. -->
 
     <PackageRequireLicenseAcceptance>true</PackageRequireLicenseAcceptance>
     <PackageLicenseFile>LICENSE.txt</PackageLicenseFile>
+    <PackageReadmeFile>README.md</PackageReadmeFile>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
     <IncludeSymbols>true</IncludeSymbols>
@@ -66,6 +67,7 @@ limitations under the License. -->
 
   <ItemGroup>
     <None Include="..\..\LICENSE.txt" Pack="true" PackagePath="" />
+    <None Include="..\..\README.md" Pack="true" PackagePath="" />
   </ItemGroup>
 
 </Project>

Yubico.YubiKey/src/Yubico.YubiKey.csproj

@@ -41,6 +41,7 @@ limitations under the License. -->
       Yubico.YubiKey is the official .NET library for integrating with the YubiKey hardware authenticator. This library supports both macOS and Windows operating systems.
     </Description>
     <PackageIcon>yubico-circle-y-mark.png</PackageIcon>
+    <PackageReadmeFile>README.md</PackageReadmeFile>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
     <IncludeSymbols>true</IncludeSymbols>
@@ -100,8 +101,8 @@ limitations under the License. -->
       <LastGenOutput>ResponseStatusMessages.Designer.cs</LastGenOutput>
       <CustomToolNamespace>Yubico.YubiKey</CustomToolNamespace>
     </EmbeddedResource>
-
     <None Include="..\..\LICENSE.txt" Pack="true" PackagePath="" />
+    <None Include="..\..\README.md" Pack="true" PackagePath="" />
     <None Include="..\..\yubico-circle-y-mark.png" Pack="true" PackagePath="" />
     <None Include="..\..\Yubico.NET.SDK.snk">
       <Link>Yubico.NET.SDK.snk</Link>