refactor: replace all use of fold with fmt; no need for ncurses

[flexiondotorg]

Description

This pull request replaces all use of fold (from ncurses) with fmt (from coreutils) so that ncurses is no longer a Quickemu dependency.

Type of change

• [x] Packaging (updates the packaging)

Checklist:

• [x] I have performed a self-review of my code
• [x] I have tested my code in common scenarios and confirmed there are no regressions