Implement Slmenu for CLI entries (or fallback)

[DevonVille]

Slmenu is a neat little feature that simulates dmenu.
It's easily installed, and allows you to pipe a list of entries into it,
to give a find-as-you-type functionality.

When retrieving an entry from the command line,
In case of several matches,
this could prompt the user for the intended entry.

It could also, possibly, prompt for an action afterwards -
copy password to clipboard, print the entry to stdout, open url in browser, etc.

See https://github.com/iwfmp/slmenu/blob/master/install
if you want to install and play around with it.

[raymontag]

Sounds nice on the first look. I'll think about.