qpeek inspired extension

[kudkudak]

There is qpeek command that allows you to stream what is going on with a job. I think it is a very partial solution for monitoring larger batch of long-running jobs like we encounter in DL. I think it would nice to port/extend qpeek to smartdispatch.

What I envision is having

smart-dispatch peek <batch_id> --err --out

or

smart-dispatch peek all --err --out

that would just print out combined err/out of selected jobs (could use qselect conventions for that).

There are also nice improvements for supporting viewing really many jobs, for instance what if

smart-dispatch peek all --err --out

opened tmux-like window, that would allow to switch quickly between all the jobs running with some shortcut.