Shooting a BSA beam at the SM will make it delaminate (#47748)

* BSA beam delams the SM via a new signal

Adds a BSA beam blocker element that blocks bluespace artillery beams. SM and singulo have it.

* Shut up Travis

* Destroy the singularity when it's BSA'd

* No shooting nar-nar with BSA

* Removed an incorrect and unhelpful comment

code/modules/power/singularity/narsie.dm

@@ -36,6 +36,7 @@
 		var/mutable_appearance/alert_overlay = mutable_appearance('icons/effects/cult_effects.dmi', "ghostalertsie")
 		notify_ghosts("Nar'Sie has risen in \the [A.name]. Reach out to the Geometer to be given a new shell for your soul.", source = src, alert_overlay = alert_overlay, action=NOTIFY_ATTACK)
 	INVOKE_ASYNC(src, .proc/narsie_spawn_animation)
+	UnregisterSignal(src, COMSIG_ATOM_BSA_BEAM) //set up in /singularity/Initialize()
 
 /obj/singularity/narsie/large/cult  // For the new cult ending, guaranteed to end the round within 3 minutes
 	var/list/souls_needed = list()

code/modules/power/singularity/singularity.dm

@@ -43,7 +43,8 @@
 		if(singubeacon.active)
 			target = singubeacon
 			break
-	return
+	AddElement(/datum/element/bsa_blocker)
+	RegisterSignal(src, COMSIG_ATOM_BSA_BEAM, .proc/bluespace_reaction)
 
 /obj/singularity/Destroy()
 	STOP_PROCESSING(SSobj, src)
@@ -447,6 +448,10 @@
 	qdel(src)
 	return(gain)
 
+/obj/singularity/proc/bluespace_reaction()
+	investigate_log("has been shot by bluespace artillery and destroyed.", INVESTIGATE_SINGULO)
+	qdel(src)
+
 /obj/singularity/deadchat_controlled
 	move_self = FALSE