Add function to remove all Discord formatting text from string

### Summary

Title
Name ideas include `toolbox.clean` and `toolbox.remove_markdown`. 

### Why is this needed?

I honestly have no idea.

### Ideal implementation

A lot of regex

### Checklist

- [X] I have searched the issue tracker and have made sure it's not a duplicate. If it is a follow up of another issue, I have specified it.