[Feature Request] ZPL playlist Support

**Is your feature request related to a problem? Please describe.**
I want to use a groove music playlist on a discord bot.
**Describe the solution you'd like**
Since, Groove stores the playlists in zpl files, it would be easy to just upload the zpl file in the folder and get it running.

**Describe the basic flow/steps of using this feature**
How this feature would be used:
1. this could be used to run groove music playlists
2.
3.

**Additional context**
Add any other context or screenshots about the feature request here.

**Have you confirmed that this idea is not already described here?**
https://github.com/jagrosh/MusicBot/projects/1
This feature is not here

Start by tracing the repository's existing playlist-loading and playback entry points, then determine how a ZPL file should be read and how its tracks enter the queue. Confirm the expected Groove ZPL contents and define the upload or folder workflow. Done means a ZPL playlist can be discovered, loaded, and played by the bot.

Written by the indexing model from the issue text.