misc/sff: New port: Simple and fast terminal file manager

- Submitter becomes maintainer

sff is a simple, fast, and feature-rich terminal file manager inspired
by nnn and guided by the suckless philosophy. It aims to provide a
reliable, efficient, and user-friendly file management experience with
high extensibility.

WWW:		https://codeberg.org/sylphenix/sff
PR:		285216