The Minecraft cog already registers top-level 'join' and 'leave', which
caused a CommandRegistrationError. Namespace these two commands under a
yt-prefix (ytjoin, ytleave, alias ytdc).
Standalone cog that owns the Red-Lavalink client connection
(initialize on startup, close on unload) and plays YouTube/yt-dlp
sources by downloading audio, transcoding to mp3, and playing through
Lavalink's local source. Per-guild queues, multi-VC capable. Commands:
play, skip, stop, pause, resume, queue, nowplaying, volume, join, leave.
owen