Agree with @rayman22201. There's many C compilers backends so enabling Zig as a known backend is step one, and there's already a PR. If someone can then setup a CI that bootstraps and tests Nim end to end with Zig as the compiler and fixes any issues, it will be awesome.
A blog post explaining why Nim + Zig plus how to set up and effectively cross-compile would be cool as well.
