feat(balance): no monotony penalty for stimulants or depressants

[Soadreqm]

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Purpose of change

The morale bonus from eating a specific food drops by two every time you eat it, and slowly returns over time, to represent the PC getting bored of a particular food. The exception to this is things with the junk_food material, meaning candy, chips, sugary soft drinks and that sort of thing. It also doesn't apply to things that aren't considered "food" - cigarettes, chewing gum and heroin never get boring.

I think alcohol and coffee should behave more like drugs in this regard. Right now, if you drink three cups of coffee, you lose your ability to enjoy coffee, and won't get it back unless you wait several days before taking more coffee. Given that many people drink several cups per day, I don't think it really gets boring like that.

Describe the solution

Made food items with nonzero stim value default to zero monotony_penalty. This currently includes:

• all types of alcohol
• all types coffee and tea
• some types of herbal tea, including bee balm and chamomile but not literal "herbal tea"
• alien fronds, leech flowers and leech bark
• cacao nibs and cacao pods
• coca leaves

It can be overridden on a per-item basis, though there are no items that do that right now.

Describe alternatives you've considered

It would also be possible to add a check for the "alcohol" material, and set monotony_penalty manually for coffee and tea, but I think checking for stim gets a pretty good list. Cacao nibs actually contain caffeine in game, though cacao pods don't. The alien plants are the weird one, but given how they're described, I think it's reasonable to assume that they're at least somewhat psychoactive and not just really tasty. If there are items there that should still get a monotony_penalty, there's fewer of them than there are types of coffee and tea.

Testing

Compiled and loaded game. Drank three cups of coffee, coffee still tasted good. Drank three shots of whiskey, still tasted good.
Since the monotony_penalty value wasn't used anywhere, temporarily gave sake a penalty of 10. Morale bonus decreased by 10 for each sip.

Additional context