Turf Cascade Subsystem (#18858)

* cascade

* working cascade

* not needed

* i'd rather not tbh

* missed undef

* not needed

* lets let the turf handle that, emergency stop

* same args

* comments fixed up

* clarity

* typo

* A better approach that mirrors original better

* .len->length()

* .

* urg

* .

* .

* .

* .

* .

* .

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Co-authored-by: Cameron Lennox <killer65311@gmail.com>
Co-authored-by: Kashargul <144968721+Kashargul@users.noreply.github.com>

code/modules/admin/verbs/secrets.dm

@@ -427,8 +427,8 @@ ADMIN_VERB(secrets, R_HOLDER, "Secrets", "Abuse harder than you ever have before
 		if("supermatter_cascade")
 			var/choice = tgui_alert(holder, "You sure you want to destroy the universe and create a large explosion at your location? Misuse of this could result in removal of flags or hilarity.","WARNING!", list("NO TIME TO EXPLAIN", "Cancel"))
 			if(choice == "NO TIME TO EXPLAIN")
-				explosion(get_turf(holder), 8, 16, 24, 32, 1)
-				new /turf/unsimulated/wall/supermatter(get_turf(holder))
+				explosion(get_turf(holder.mob), 8, 16, 24, 32, 1)
+				SSturf_cascade.start_cascade(get_turf(holder.mob), /turf/unsimulated/wall/supermatter)
 				SetUniversalState(/datum/universal_state/supermatter_cascade)
 				message_admins("[key_name_admin(holder)] has managed to destroy the universe with a supermatter cascade. Good job, [key_name_admin(holder)]")