Add some type of custom realtime editable command system

[hexaflexahexagon]

This would make it possible for mods to add new basic chat commands without having to edit the source code and rebuild the bot.

Something like:

> !addcom error "Some long response about `mat_error_texture_advanced 2` and `mat_error_texture_advanced_basetexture dev/reflectivity_60` and how they're super cool!"
>
> !error
Some long response about `mat_error_texture_advanced 2` and `mat_error_texture_advanced_basetexture dev/reflectivity_60` and how they're super cool!
>
> !listcom
error, climb, release, key
>
> !delcom key
> 

...etc.