ULID for Zig

[nektro]

Wouldn't recommend adding this to the README just quite since there's a few more methods and tests I want to add but I implemented a binary implementation for Zig and am actively using it in a project. Leaving this issue here in case anyone comes looking for it at the upstream repo.

https://github.com/nektro/zig-ulid

Zig: https://ziglang.org / https://github.com/ziglang/zig