Makes COMSIG_MOB_SWAP_HANDS pass the current and previous held items as args (#95055)

## About The Pull Request

Tin, that's all. In a lot of cases you will want to have these,
especially if you are using elements with this signal.

## Why It's Good For The Game

Better code

## Changelog

Not player-facing

code/datums/components/fullauto.dm

@@ -209,8 +209,7 @@
 		stop_autofiring()
 	return COMPONENT_CLIENT_MOUSEUP_INTERCEPT
 
-
-/datum/component/automatic_fire/proc/stop_autofiring(datum/source, atom/object, turf/location, control, params)
+/datum/component/automatic_fire/proc/stop_autofiring(mob/living/source, obj/item/swapped_to, obj/item/swapped_from)
 	SIGNAL_HANDLER
 	if(autofire_stat != AUTOFIRE_STAT_FIRING)
 		return

code/datums/components/throwbonus_on_windup.dm

@@ -91,7 +91,7 @@
 	else
 		end_windup()
 
-/datum/component/throwbonus_on_windup/proc/on_hands_swap(mob/living/source)
+/datum/component/throwbonus_on_windup/proc/on_hands_swap(mob/living/source, obj/item/swapped_to, obj/item/swapped_from)
 	SIGNAL_HANDLER
 
 	if(source.get_active_held_item() != parent)