[Feature Request] Aliases for play playlist <name>

### Is your feature request related to a problem? Please describe.

We are using the bot most if the time to play playlist from youtube and we use the playlist feature of the bot. But I did not find any way to set a alias for the command -play playlist

### What is your ideal solution to the problem?

Use the alias for `playlists = [ pls ]` after the alias for `play = [ p ]` and like that make the command `-p pls `

### How would this feature be used?

1. The user would type the command ` `
2. The bot would start playing the playlist

### Additional Info

I don't think this is necessary, it's just quality of life.
And Your bot is the only one that really works well. Thanks

### Checklist

- [X] I have checked [the documentation](https://jmusicbot.com/) to make sure this feature doesn't already exist
- [X] I have searched for [similar feature requests](https://github.com/jagrosh/MusicBot/labels/enhancement)
- [X] I have confirmed that my requests is **not** on the [list of things that will not be added](https://jmusicbot.com/things-that-wont-be-added)
- [X] I am running the latest version of the bot: 

Start by locating the command-alias handling and the playlist command entry point; the issue does not name specific files or tests. Determine how aliases for play and playlists are configured, then verify that a configured pair accepts the requested prefix, play alias, playlist alias, and playlist name and starts the playlist.

Written by the indexing model from the issue text.