Slime core removal surgery changes (#84241)

## About The Pull Request

Fixed an issue with incorrect slime dead icon after core removal
surgery. Made the surgery yield all cores in case if the slime had a
steroid potion applied.

## Why It's Good For The Game

The icon was broken. Less clicks for surgery.

## Changelog

🆑
fix: Fixed dead slime icon not showing when cores are extracted
qol: Slime core removal surgery extracts all cores on completion
/🆑

code/modules/mob/living/basic/slime/slime.dm

@@ -189,15 +189,17 @@
 	cut_overlays()
 	if(slime_type.transparent)
 		alpha = SLIME_TRANSPARENCY_ALPHA
-	var/icon_text = "[slime_type.colour]-[life_stage]"
-	icon_dead = "[icon_text]-dead"
+
+	icon_dead = !cores ? "[slime_type.colour]-cut" : "[slime_type.colour]-[life_stage]-dead"
+
 	if(stat != DEAD)
-		icon_state = icon_text
+		icon_state = "[slime_type.colour]-[life_stage]"
 		if(current_mood && current_mood != SLIME_MOOD_NONE && !stat)
 			add_overlay("aslime-[current_mood]")
 	else
 		icon_state = icon_dead
-	..()
+
+	return ..()
 
 /mob/living/basic/slime/get_status_tab_items()
 	. = ..()
@@ -364,6 +366,21 @@
 		visible_message(span_warning("The mutated core shudders, and collapses into a puddle, unable to maintain its form."))
 	qdel(src)
 
+///Proc for slime core removal surgery, tries to remove cores from a dead slime.
+/mob/living/basic/slime/proc/try_extract_cores(count = 1)
+	if(stat != DEAD)
+		return FALSE
+	if(count <= 0 || cores < count)
+		return FALSE
+
+	var/core_count = min(count, cores)
+	for(var/i in 1 to core_count)
+		new slime_type.core_type(loc)
+		cores--
+
+	regenerate_icons()
+
+	return TRUE
 
 ///Makes the slime peaceful and content
 /mob/living/basic/slime/proc/set_pacified_behaviour()