binstall doc is missing, and causes confusion

I saw there was no `cargo binstall` mentioned in the docs, but it mentions `cargo install yazi-build` as a requirement. So I tried using `cargo binstall yazi-build` - which succeeded, but did NOT create either `yazi-fm` nor `yazi-cli`. And only after I searched the repo, a saw that `cargo binstall yazi-fm` should work directly (and it did). Please document binstall usage, and mention that `binstall yazi-build` wouldn't work. This is kinda weird tbh - `cargo install` and `cargo binstall` have to be used very differently :(