skrell snowflake organs (#3290)

adds the sprites that wer6 made for skrell, with loow's approval

code/modules/organs/misc.dm

@@ -45,6 +45,8 @@
 //VOX ORGANS.
 /obj/item/organ/stack
 	name = "cortical stack"
+	icon_state = "brain-prosthetic"
+	organ_tag = "stack"
 	parent_organ = "head"
 	robotic = 2
 	vital = 1
@@ -56,15 +58,5 @@
 		backup_time = world.time
 		if(owner.mind) backup = owner.mind
 
-/obj/item/organ/stack/vox
-
-/obj/item/organ/stack/vox/stack
-
-/obj/item/organ/stack
-	name = "cortical stack"
-	icon_state = "brain-prosthetic"
-	organ_tag = "stack"
-	robotic = 2
-
 /obj/item/organ/stack/vox
 	name = "vox cortical stack"