Cats can meow and purr (#86841)

## About The Pull Request


https://github.com/user-attachments/assets/a2572845-b345-423d-ab46-d677af5bc7bb


https://github.com/user-attachments/assets/7095c897-06eb-4a62-ab23-ce966930c974

additionally

- [x] make petting cats have them purr work.
## Why It's Good For The Game
it's cute
## Changelog
🆑 grungus
add: cat mobs can *meow and *purr
sound: sound for meow and purr emotes
code: added support for passing emotes into the pet_bonus element
/🆑

---------

Co-authored-by: MrMelbert <51863163+MrMelbert@users.noreply.github.com>

code/datums/ai/basic_mobs/basic_subtrees/speech_subtree.dm

@@ -216,11 +216,9 @@
 
 /datum/ai_planning_subtree/random_speech/cats
 	speech_chance = 10
-	speak = list(
-		"mrawww!",
-		"meow!",
-		"maw!",
-	)
+	sound = list(SFX_CAT_MEOW)
+	emote_hear = list("meows.")
+	emote_see = list("meows.")
 
 /datum/ai_planning_subtree/random_speech/blackboard //literal tower of babel, subtree form
 	speech_chance = 1