[Feature] Discount Dan's Covfefe

[LuigiThirty]

Adds Discount Dan's Covfefe to the coffee vendors. It's ersatz coffee with the usual Discount Dan's quality/nasty reagents so it can't legally be called coffee. It costs 1 credit. Regular coffee now costs 2 credits.

Uses the regular coffee sprite and behavior. I wasn't sure which vendor to put it in so I just put it in the coffee vendor.


Compare: https://github.com/goonstation/goonstati...e?expand=1