Make neix colorfull!

[DhruvaSambrani]

Describe the solution you'd like

Neix should have a coloured UI, much like tut. By using a colored UI, we may be able to reduce the columns used for borders, while making neix more attractive to the eye.

Ideally, the colours should be configurable, but I don't know if ncurses supports anything beyond the 8bit colors, but even those can give a wide variety of colors.

Additional context

This is an eye-candy feature which is probably not high priority, but easy to implement.

[qw3rtty]

@DhruvaSambrani great idea! We should definitely do that.