Turns isholy into a trait and adds a trait mind helper (#23107)

* Converts isHoly into a trait

* Moves holy from body to mind

* Uncurses the source of curses

* Updates source to roundstart trait

* Contrabang fixes

* Forgot one

* Add trait mind helper

* Request changed Dgamerr/Contra

* Fixes issue

* Nullchecks minds

code/modules/surgery/organs/vocal_cords.dm

@@ -175,7 +175,7 @@ GLOBAL_DATUM_INIT(multispin_words, /regex, regex("like a record baby"))
 
 	if(owner.mind)
 		//Holy characters are very good at speaking with the voice of god
-		if(owner.mind.isholy)
+		if(HAS_MIND_TRAIT(owner, TRAIT_HOLY))
 			power_multiplier *= 2
 		//Command staff has authority
 		if(owner.mind.assigned_role in GLOB.command_positions)