Consume Wino.Mail.Contracts package

nuget.config

@@ -3,6 +3,7 @@
 	<packageSources>
 		<!--To inherit the global NuGet package sources remove the <clear/> line below -->
 		<clear />
+		<add key="github" value="https://nuget.pkg.github.com/bkaankose/index.json" />
 		<add key="nuget" value="https://api.nuget.org/v3/index.json" />
 		<add key="labsFeed" value="https://pkgs.dev.azure.com/dotnet/CommunityToolkit/_packaging/CommunityToolkit-Labs/nuget/v3/index.json" protocolVersion="3" />
 	</packageSources>
@@ -12,6 +13,9 @@
        everything else from nuget.org. -->
 	<packageSourceMapping>
 		<!-- key value for <packageSource> should match key values from <packageSources> element -->
+		<packageSource key="github">
+			<package pattern="Wino.Mail.Contracts" />
+		</packageSource>
 		<packageSource key="nuget">
 			<package pattern="*" />
 			<package pattern="CommunityToolkit.Common" />