Basic mobs targeting, attacks, and pig migration. (#28987)

* Basic mobs targeting, attacks, and pig migration.

* run updatepaths

* fix duplicate macro def

* Update code/datums/ai/basic_mobs/basic_ai_behaviors/basic_attacking.dm

Co-authored-by: Burzah <116982774+Burzah@users.noreply.github.com>
Signed-off-by: warriorstar-orion <orion@snowfrost.garden>

---------

Signed-off-by: warriorstar-orion <orion@snowfrost.garden>
Co-authored-by: Burzah <116982774+Burzah@users.noreply.github.com>

code/datums/components/ai_retaliate_advanced.dm

@@ -0,0 +1,37 @@
+/**
+ * Attached to a mob with an AI controller, passes things which have damaged it to a blackboard.
+ * The AI controller is responsible for doing anything with that information.
+ * Differs from the element as it passes new entries through a callback.
+ */
+/datum/component/ai_retaliate_advanced
+	/// Callback to a mob for custom behaviour
+	var/datum/callback/post_retaliate_callback
+
+/datum/component/ai_retaliate_advanced/Initialize(datum/callback/post_retaliate_callback)
+	if(!ismob(parent))
+		return ELEMENT_INCOMPATIBLE
+
+	src.post_retaliate_callback = post_retaliate_callback
+	parent.AddElement(/datum/element/relay_attackers)
+
+	ADD_TRAIT(parent, TRAIT_SUBTREE_REQUIRED_OPERATIONAL_DATUM, type)
+
+/datum/component/ai_retaliate_advanced/Destroy(force)
+	post_retaliate_callback = null
+	return ..()
+
+/datum/component/ai_retaliate_advanced/RegisterWithParent()
+	RegisterSignal(parent, COMSIG_ATOM_WAS_ATTACKED, PROC_REF(on_attacked))
+
+/datum/component/ai_retaliate_advanced/UnregisterFromParent()
+	UnregisterSignal(parent, COMSIG_ATOM_WAS_ATTACKED)
+
+/// Add an attacking atom to a blackboard list of things which attacked us
+/datum/component/ai_retaliate_advanced/proc/on_attacked(mob/victim, atom/attacker)
+	SIGNAL_HANDLER
+
+	if(!victim.ai_controller)
+		return
+
+	victim.ai_controller.insert_blackboard_key_lazylist(BB_BASIC_MOB_RETALIATE_LIST, attacker)
+	post_retaliate_callback?.InvokeAsync(attacker)