Initial exploration and planning

Co-authored-by: drewnoakes <350947+drewnoakes@users.noreply.github.com>

Author: Copilot

NuGet.Config

@@ -4,4 +4,7 @@
     <add key="NuGet.org" value="https://api.nuget.org/v3/index.json" />
     <add key="xunit" value="https://www.myget.org/F/xunit/api/v3/index.json" />
   </packageSources>
+  <disabledPackageSources>
+    <add key="xunit" value="true" />
+  </disabledPackageSources>
 </configuration>