support bash completion

[taukakao]

Bash completion for stuff like apt or git doesn't work.
It doesn't matter if it's running on the host or in the container.

[jardon]

Is this still an issue? If so, could you provide more info to reproduce?

[taukakao]

@jardon
Yes, this still seems like an issue.
If you open a blackbox termninal, type in apt and press tab you will get suggestions for files.
If you instead open a shell in rescue mode, and then do "vso shell" and do the same thing you will get the correct completions like "autoclean", "install" or "upgrade"

[taukakao]

/usr/bin/vso-os-shell calls
vso run /usr/bin/os-shell
instead of
vso shell

if I use the run command, completions break as well