Request: ctrl-n and ctrl-p as aliases for up and down when the console is focused

[wurli]

Fairly straightforward :) For some reason I just can't get used to the arrow keys for this, and I don't think it's possible to add this as a user keymap.

Thank you!

[jmcphers]

I've filed this as #6650, see also #1953 for some discussion of readline keybindings in Positron. Appreciate the feedback!