Hardcore random gets a sixpack (#72992)

Have you ever really thought about how incredible ripped paraplegics
must be? Moving is much more difficult and they're always using their
arms


![image](https://user-images.githubusercontent.com/7501474/215131388-14075809-fa38-4986-a0b0-9b2e76fbfece.png)

🆑
qol: Hardcore random gets a sixpack
/🆑

### Why is this good for the game?

Everyone currently doing hardcore random gets a sixpack, it's a very
obscure visual distinction that I think is fun to just mess with people
with. "Why is the anemic quadruple amputee with brain cancer ripped to
shreds?"

This is also all just an elaborate scheme to display how the new
bodypart_overlay system can be used with absolutely minimal effort

code/modules/mob/dead/new_player/preferences_setup.dm

@@ -26,6 +26,9 @@
 	var/next_hardcore_score = select_hardcore_quirks()
 	character.hardcore_survival_score = next_hardcore_score ** 1.2  //30 points would be about 60 score
 
+	//Add a sixpack because honestly
+	var/obj/item/bodypart/chest/chest = character.get_bodypart(BODY_ZONE_CHEST)
+	chest.add_bodypart_overlay(new /datum/bodypart_overlay/simple/sixpack() )
 
 /**
  * Goes through all quirks that can be used in hardcore mode and select some based on a random budget.