Ghosts now notified when larva are about to chestburst out of un-nest…

…ed (#3947)

# About the pull request

This PR tells ghosts when someone is about to be chestbursted (only if
not nested)

# Explain why it's good for the game

It is good to have interesting events like chestbursts be told to ghosts
before it happens, letting them observe the event in advance

# Testing Photographs and Procedure


![image](https://github.com/cmss13-devs/cmss13/assets/91219575/ca2b486f-f9ed-41cb-a249-fd4ddd8e4d91)

# Changelog
:cl:
qol: Ghosts now informed when a non-nested host is about to chestburst
/:cl:

code/modules/mob/living/carbon/xenomorph/Embryo.dm

@@ -218,6 +218,18 @@
 		to_chat(new_xeno, "Talk in Hivemind using <strong>;</strong> (e.g. ';My life for the queen!')")
 		playsound_client(new_xeno.client, 'sound/effects/xeno_newlarva.ogg', 25, 1)
 
+	// Inform observers to grab some popcorn if it isnt nested
+	if(!HAS_TRAIT(affected_mob, TRAIT_NESTED))
+		var/area/burst_area = get_area(src)
+		if(burst_area)
+			for(var/mob/dead/observer/observer as anything in GLOB.observer_list)
+				to_chat(observer, SPAN_DEADSAY("A <b>[new_xeno.hive.prefix]Larva</b> is about to chestburst out of <b>[affected_mob]</b> at \the <b>[burst_area]!</b> [OBSERVER_JMP(observer, affected_mob)]"))
+			to_chat(src, SPAN_DEADSAY("A <b>[new_xeno.hive.prefix]Larva</b> is about to chestburst out of <b>[affected_mob]</b> at \the <b>[burst_area]!</b>"))
+		else
+			for(var/mob/dead/observer/observer as anything in GLOB.observer_list)
+				to_chat(observer, SPAN_DEADSAY("A <b>[new_xeno.hive.prefix]Larva</b> is about to chestburst out of <b>[affected_mob]!</b> [OBSERVER_JMP(observer, affected_mob)]"))
+			to_chat(src, SPAN_DEADSAY("A <b>[new_xeno.hive.prefix]Larva</b> is about to chestburst out of <b>[affected_mob]!</b>"))
+
 	stage = 6
 
 /mob/living/carbon/xenomorph/larva/proc/cause_unbearable_pain(mob/living/carbon/victim)