Provide sample project and documentation for a web service secured with WS-Federation

[ws-federation](https://docs.microsoft.com/en-us/aspnet/core/security/authentication/ws-federation?view=aspnetcore-2.1) docs for aspnetcore provide a good place to start from but we need to tie everything together in once place.

Aha! Link: https://synergex.aha.io/features/HC-106