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/__DEFINES/basic_mobs.dm

@@ -24,6 +24,9 @@
 /// Above this speed we stop gliding because it looks silly
 #define END_GLIDE_SPEED 10
 
+///hunger cooldown for basic mobs
+#define EAT_FOOD_COOLDOWN 45 SECONDS
+
 ///mook attack status flags
 #define MOOK_ATTACK_NEUTRAL 0
 #define MOOK_ATTACK_WARMUP 1