Adds a visual and audio cue when the sleeper cures addiction (#17604)

* Adds a visible and audio cue when the sleeper cures addiction

* Removes implied src

* Changes visible_message to atom_say

Co-authored-by: Vicacrov <fe.adelina@gmail.com>

code/game/machinery/Sleeper.dm

@@ -5,7 +5,7 @@
 ////////////
 
 /obj/machinery/sleeper
-	name = "Sleeper"
+	name = "sleeper"
 	icon = 'icons/obj/cryogenic2.dmi'
 	icon_state = "sleeper-open"
 	var/base_icon = "sleeper"
@@ -127,6 +127,8 @@
 			if(world.timeofday > (R.last_addiction_dose + ADDICTION_SPEEDUP_TIME)) // 2.5 minutes
 				addiction_removal_chance = 10
 			if(prob(addiction_removal_chance))
+				atom_say("Patient's addiction was cured.")
+				playsound(get_turf(src), 'sound/machines/ping.ogg', 50, 0)
 				to_chat(occupant, "<span class='boldnotice'>You no longer feel reliant on [R.name]!</span>")
 				occupant.reagents.addiction_list.Remove(R)
 				qdel(R)