Dogs now flee from mobs with tongs (#78797)

AI dogs with the dog controller behaviour will flee from a target with
tongs in hand.

Untested because I literally cannot play byond.

## Why It's Good For The Game
https://www.youtube.com/watch?v=cXIAZtwvgz0

## Changelog
🆑 oranges
add: Dogs now react to centrist grillers more realistically
/🆑

code/datums/ai/basic_mobs/targetting_datums/with_object.dm

@@ -0,0 +1,39 @@
+/**
+ * Find mobs who are holding the configurable object type
+ *
+ * This is an extension of basic targeting behaviour, that allows you to
+ * only target the mob if they have a specific item in their hand.
+ *
+ */
+/datum/targetting_datum/basic/holding_object
+	// We will find mobs who are holding this object in their hands
+	var/object_type_path = null
+
+/**
+ * Create an instance of the holding object targeting datum
+ *
+ * * object_type_path Pass an object type path, this will be compared to the items
+ *   in targets hands to filter the target list.
+ */
+/datum/targetting_datum/basic/holding_object/New(object_type_path)
+	if (!ispath(object_type_path))
+		stack_trace("trying to create an item targeting datum with no valid typepath")
+		// Leaving object type as null will make this basically a noop
+		return
+	src.object_type_path = object_type_path
+
+///Returns true or false depending on if the target can be attacked by the mob
+/datum/targetting_datum/basic/holding_object/can_attack(mob/living/living_mob, atom/target, vision_range, check_faction = FALSE)
+	if (object_type_path == null)
+		return FALSE // no op
+	if(!ismob(target))
+		return FALSE // no hands no problems
+
+	// Look at me, type casting like a grown up
+	var/mob/targetmob = target
+	// Check if our parent behaviour agrees we can attack this target (we ignore faction by default)
+	var/can_attack = ..()
+	if(can_attack && targetmob.is_holding_item_of_type(object_type_path))
+		return TRUE // they have the item
+	// No valid target
+	return FALSE