zsh-like autocompletion (paths)

Created by: matthiaskrgr

On both ion and zsh, I can write something like cd rust-i<tab> and it will autocomplete to cd rust-ion, however zsh also supports path autocompletion between /s, let's say I have /home/matthias/vcs/github/rust, I can write cd /h/m/v/g/r<tab> and it will autocomplete to /home/matthias/vcs/github/rust if that is the only match found. Even /////rust would work if I only had a single "rust" directory at that directory depth in any subfolder (usually this is a silly idea though since zsh would query the FS for all the folder names which causes longer IO wait than actually typing a few letters of the path manually).

Anyway this saves me quite some typing, would be nice to have that in ion as well, in my opinion. :)