[MIRROR] Extensive surgery additions (#5590)

* Extensive surgery additions

* Update role_preferences.dm

* Update surgery_step.dm

code/datums/brain_damage/brain_trauma.dm

@@ -10,12 +10,13 @@
 	var/gain_text = "<span class='notice'>You feel traumatized.</span>"
 	var/lose_text = "<span class='notice'>You no longer feel traumatized.</span>"
 	var/can_gain = TRUE //can this be gained through random traumas?
-	var/permanent = FALSE //can this be cured?
+	var/resilience = TRAUMA_RESILIENCE_BASIC //how hard is this to cure?
 
-/datum/brain_trauma/New(obj/item/organ/brain/B, _permanent)
+/datum/brain_trauma/New(obj/item/organ/brain/B, _resilience)
 	brain = B
 	owner = B.owner
-	permanent = _permanent
+	if(_resilience)
+		resilience = _resilience
 	if(owner)
 		on_gain()
 

code/datums/brain_damage/severe.dm

@@ -3,6 +3,7 @@
 //They cannot be cured with chemicals, and require brain surgery to solve.
 
 /datum/brain_trauma/severe
+	resilience = TRAUMA_RESILIENCE_SURGERY
 
 /datum/brain_trauma/severe/mute
 	name = "Mutism"