Add Topaz OSS Authz (#1169)

Add Topaz open-source authorization system for dotnet applications to the list. Please LMK if you need anything else. Thanks!

README.md

@@ -215,6 +215,7 @@ To the extent possible under law, [Vitali Fokin](https://github.com/quozd) has w
 * [IdentityServer](https://github.com/IdentityServer) - Extensible OAuth2 and OpenID Connect provider framework.
 * [OAuth](https://github.com/danielcrenna/vault/tree/master/oauth) - A very lightweight library for generating OAuth 1.0a signatures written in C#
 * [Stuntman](https://rimdev.io/stuntman/) - Stuntman is a library for impersonating users during development leveraging .NET Claims Identity.
+* [Topaz](https://www.topaz.sh) - An open-source authorization project for .NET applications.  
 
 ## Blazor