C Bindings

[Sand3r-]

Hello @john-chapman, thank you for creating and sharing this awesome library.
One important feature that the library is missing are C-bindings. These would not only allow C programmers to benefit from this library, but make it easier to port to languages such as Rust or zig.

[Srekel]

FYI we've started briefly on some Zig bindings here https://github.com/Srekel/zig-im3d/

Uses c2z to generate the basics and then has some touchups. Still WIP.