Refactors inventory items code to allow to play custom sounds, adds custom sounds to pill bottles and patch packs (#21634)

* Removed dupe playsound, sound now uses var

* pill bottles now have sounds

* Patch packs also have sounds

* Increased patch packs volume by 4db

* Moved sounds to folder, added licence and credits.

* Fixed invalid sound paths

code/game/objects/items/weapons/storage/firstaid.dm

@@ -255,6 +255,7 @@
 	icon = 'icons/obj/chemical.dmi'
 	item_state = "contsolid"
 	belt_icon = "pill_bottle"
+	use_sound = "pillbottle"
 	w_class = WEIGHT_CLASS_SMALL
 	can_hold = list(/obj/item/reagent_containers/food/pill)
 	cant_hold = list(/obj/item/reagent_containers/food/pill/patch)
@@ -361,6 +362,7 @@
 	desc = "It's a container for storing medical patches."
 	icon_state = "patch_pack"
 	belt_icon = "patch_pack"
+	use_sound = "patchpack"
 	can_hold = list(/obj/item/reagent_containers/food/pill/patch)
 	cant_hold = list()
 	rapid_intake_message = "flips the lid of the patch pack open and begins rapidly stamping patches on themselves!"

code/game/objects/items/weapons/storage/storage_base.dm

@@ -41,7 +41,6 @@
 	var/pickup_all_on_tile = TRUE
 	/// Sound played when used. `null` for no sound.
 	var/use_sound = "rustle"
-
 	/// What kind of [/obj/item/stack] can this be folded into. (e.g. Boxes and cardboard)
 	var/foldable = null
 	/// How much of the stack item do you get.
@@ -141,7 +140,6 @@
 		return ..()
 	if(!(loc == M) || (loc && loc.loc == M))
 		return
-	playsound(loc, "rustle", 50, 1, -5)
 	if(!M.restrained() && !M.stat)
 		switch(over_object.name)
 			if("r_hand")
@@ -163,7 +161,7 @@
 	. = ..()
 	if(ishuman(user) && Adjacent(user) && !user.incapacitated(FALSE, TRUE))
 		show_to(user)
-		playsound(loc, "rustle", 50, TRUE, -5)
+		playsound(loc, use_sound, 50, TRUE, -5)
 		add_fingerprint(user)
 	else if(isobserver(user))
 		show_to(user)
@@ -549,7 +547,7 @@
 
 
 /obj/item/storage/attack_hand(mob/user)
-	playsound(loc, "rustle", 50, TRUE, -5)
+	playsound(loc, use_sound, 50, TRUE, -5)
 
 	if(ishuman(user))
 		var/mob/living/carbon/human/H = user