x11/wl-find-cursor: New port: Highlight and print out mouse position on Wayland

wl-find-cursor is a tool to highlight and print out global mouse position
on Wayland, especially for compositors based on wlroots, such as Sway.
WWW: https://github.com/cjacker/wl-find-cursor

PR: 293818
Reported by: agathos5@gmail.com, linimon (WantedPorts)
Approved by: vvd (mentor)
Co-authored-by: Vladimir Druzenko <vvd@FreeBSD.org>