New command: prefer

You can now update your preferences to make use of this bot more convenient.

Currently you can only set preferences on these 2 things:

1. Beta / prod site (to give beta/prod links)

2. Light / dark mode (light mode graphs in future ??)

Usage:

@wasteof_bot prefer <list of preferences separated by a space> 

wob prefer <list of preferences separated by a space> | (Only in chat). 

If the list isn't given, it just shows your current preferences.

Example:

wob prefer light

wob prefer prod 

wob prefer beta

wob prefer dark beta   

Use @wasteof_bot instead of wob for anywhere outside /chat