Add CodegenCS (quozd#1246)

README.md

@@ -1322,6 +1322,7 @@ metadata in media files, including video, audio, and photo formats
 
 ## Source Generator
 
+* [CodegenCS](https://github.com/Drizin/CodegenCS) - Code Generation Toolkit where templates are written using plain C#. Command-line tool, MSBuild task, Visual Studio Extension, and Roslyn Source Generator. 
 * [M31.FluentAPI](https://github.com/m31coding/M31.FluentAPI) - Effortlessly generate fluent APIs for your C# classes.
 * [Supernova.Enum.Generators](https://github.com/EngRajabi/Enum.Source.Generator) - A C# source generator to create an enumeration class from an enum type. With this package, you can work on enums very, very fast without using reflection.