24/7 Music feature

[Mittelblut9]

Add a feature to add the bot to a channel for 24/7 which plays a playlist all over the time.

First ideas:

• Music commands only executable by Moderators
• Bot saves Playlist in the database and add it back in, if it restarts or the bot somehow leaves the voice channel.
• Can only get turned off by a command
• To safe resources, it's only available for all who request this feature.
• Loop automatically enabled
• Own commands
• • /247 play [playlist/song]
• • /247 stop
• • /247 pause
• • /247 add [playlist/song]
• • /247 remove [Queue ID]
• • /247 nowplaying
• • /247 announcements [enabled/disabled=default] [channel (if enabled)] (When a new song has played, the bot will automatically announce the song)
• • /247 pauseonempty [true/false] (The bot pauses the music of no one is in the channel)