[Feature Request] Proxy commands

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

repeated use of the same commands within a server of friends lead me to request this, as we just thought it would be a nice feature to spice up the bot

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

A proxy command works similarly to a command alias, except instead of subbing in a command for another, a proxy would be a suffix that would he read as a command

so for example you could set
!DOOM to read as a Play request for a MF DOOM playlist or !SANS to just play Megalovania

### How would this feature be used?

Self explanitory, a user would just need to type an already common phrase into the chat instead of looking for a past message or a link to copy, mosrly just useful for friend groups with inside jokes relating to certain tracks or clips

### Additional Info

_No response_

### 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: 

The issue does not name any files, tests, or entry points. Begin by locating the existing command-alias and command-parsing behavior, then define how proxy suffixes are configured, stored, matched, and converted into play requests. Done should include a documented configuration path and coverage for examples such as !DOOM and !SANS.

Written by the indexing model from the issue text.