multimedia/supersonic: New port: Lightweight cross-platform desktop client for Subsonic music servers

Supersonic is a lightweight cross-platform desktop client for
Subsonic (or OpenSubsonic API), supporting Navidrome, Jellyfin,
Gonic, LMS, Nextcloud Music, Airsonic-Advanced, Ampache, Funkwhale
and Supysonic.

PR: 275681
Approved by: acm (mentor)