Mass-replacement of stat to machine_stat (#48758)

Living and machine stat vars are pretty different, one uses flags and other number-defines.
This should make some other mass-replacements and searches a bit easier.

code/modules/library/lib_machines.dm

@@ -573,7 +573,7 @@ GLOBAL_LIST(cachedbooks) // List of our cached book datums
 		return ..()
 
 /obj/machinery/bookbinder/proc/bind_book(mob/user, obj/item/paper/P)
-	if(stat)
+	if(machine_stat)
 		return
 	if(busy)
 		to_chat(user, "<span class='warning'>The book binder is busy. Please wait for completion of previous operation.</span>")
@@ -586,7 +586,7 @@ GLOBAL_LIST(cachedbooks) // List of our cached book datums
 	sleep(rand(200,400))
 	busy = FALSE
 	if(P)
-		if(!stat)
+		if(!machine_stat)
 			visible_message("<span class='notice'>[src] whirs as it prints and binds a new book.</span>")
 			var/obj/item/book/B = new(src.loc)
 			B.dat = P.info