Zig's std lib documentation will keep getting better. In the meantime, the std lib code itself is so well written, it's worth a read, even coming from another language, and even if you have no intention to learn Zig. I found it easy to read and was impressed by the code structure and quality of the design.
Of course, that's not to suggest that code is documentation, but I've learned alot about improving my programming in general, just by reading Zig's std lib.