Release static manpages

Maybe it's kinda weird to spit out manpages on a specific flag like it is now. It makes is hard to package the manpages on e.g. AUR without first installing the CLI.

https://github.com/sharkdp/fd/blob/master/doc/fd.1

`fd` simply has manpages as static files, maybe we can keep them in sync via `build.rs` and/or a pre-commit task.