chore: add zitrus (#202)

Author: GasInfinity

README.md

@@ -680,6 +680,7 @@ TOC is generated by [markdown-toc](https://github.com/jonschlinkert/markdown-toc
 - [Avokadoen/ecez](https://github.com/Avokadoen/ecez) - An archetype based ECS library written in pure Zig.
 - [darltrash/zcutenet](https://codeberg.org/darltrash/zcutenet) - A cute_net.h binding and wrapper for Zig, for realtime networking.
 - [Avokadoen/ecez_vulkan](https://github.com/Avokadoen/ecez_vulkan) - A scene editor built on [ecez](https://github.com/Avokadoen/ecez) and Vulkan.
+- [GasInfinity/zitrus](https://codeberg.org/GasInfinity/zitrus) - A 3DS SDK with all the bells and whistles in pure Zig.
 
 ### Audio Processing