New port: multimedia/mpv-mpris: MPRIS plugin for mpv

mpv-mpris is a plugin for mpv which allows control of the player using standard
media keys.

This plugin implements the MPRIS D-Bus interface and can be controlled using
tools such as playerctl or through many Linux DEs, such as Gnome and KDE.

WWW: https://github.com/hoyon/mpv-mpris

• This makes KDE Plasma desktop's panels media control available for mpv, and also exposes mpv to kdeconnect-kde.