Port sound player and sound tokens from Bay (#15554)

code/modules/scripting/stack.dm

@@ -1,23 +0,0 @@
-/stack
-	var/list
-		contents=new
-	proc
-		Push(value)
-			contents+=value
-
-		Pop()
-			if(!contents.len) return null
-			. = contents[contents.len]
-			contents.len--
-
-		Top() //returns the item on the top of the stack without removing it
-			if(!contents.len) return null
-			return contents[contents.len]
-
-		Copy()
-			var/stack/S=new()
-			S.contents=src.contents.Copy()
-			return S
-
-		Clear()
-			contents.Cut()