slightly redoes how animals hunt for food (#87166)

## About The Pull Request
before, if u wanted to make ur animal hunt for food, u had to give them
the find food subtree, the attacking subtree, and had to edit their
targeting stratedgy to include items. this makes it so u only have to
give them just 1 subtree which will handle everything it needs to. also
makes it alot more customizable, u can now set a hunger cooldown for ur
animals, and cute emotes for them to play after eating food

## Why It's Good For The Game
makes it more convenient for future devs to include food hunting
behaviors to their animals, while also making it more customizable

## Changelog
🆑
code: animals' food hunting behavior has been refactored, please report
any bugs
/🆑

code/modules/mob/living/basic/ruin_defender/skeleton.dm

@@ -162,7 +162,7 @@
 /// Skeletons mostly just beat people to death, but they'll also find and drink milk.
 /datum/ai_controller/basic_controller/skeleton
 	blackboard = list(
-		BB_TARGETING_STRATEGY = /datum/targeting_strategy/basic/allow_items,
+		BB_TARGETING_STRATEGY = /datum/targeting_strategy/basic,
 		BB_TARGET_MINIMUM_STAT = HARD_CRIT,
 		BB_EMOTE_KEY = "rattles",
 		BB_EMOTE_CHANCE = 20,