Prevents Mindswapping on Bitrunners (#79323)

## About The Pull Request

Fixes #79310

Adds a new trait to prevent mindswaps (which is just useful for any
future cases when we don't wanna rely on the blacklist typecache) while
also accounting for bitrunners (who you can't mindswap because their
mind is elsewhere) and their avatars (because that's not a real mind now
is it).

this does mean that bitrunners while bitrunning are immune to all
mindswaps but i don't have a good answer on how to fix it. i don't even
much like the idea of VR but I think that having these traits are useful
enough for future utilization.
## Why It's Good For The Game

prevent big breakage.
## Changelog

🆑
fix: Bitrunners can no longer get mass-mindswapped out of their avatar
when the wizard does the event. Something about machinery and magic not
going well together.
/🆑

code/__DEFINES/traits.dm

@@ -1345,3 +1345,6 @@ Remember to update _globalvars/traits.dm if you're adding/removing/renaming trai
 #define TRAIT_WING_BUFFET_TIRED "wing_buffet_tired"
 /// Trait given to a dragon who fails to defend their rifts
 #define TRAIT_RIFT_FAILURE "fail_dragon_loser"
+
+/// Trait given to mobs that we do not want to mindswap
+#define TRAIT_NO_MINDSWAP "no_mindswap"

code/modules/bitrunning/components/avatar_connection.dm

@@ -33,6 +33,7 @@
 	server.avatar_connection_refs.Add(WEAKREF(src))
 
 	avatar.key = old_body.key
+	ADD_TRAIT(avatar, TRAIT_NO_MINDSWAP, REF(src)) // do not remove this one
 	ADD_TRAIT(old_body, TRAIT_MIND_TEMPORARILY_GONE, REF(src))
 
 	RegisterSignals(old_body, list(COMSIG_LIVING_DEATH, COMSIG_MOVABLE_MOVED, COMSIG_LIVING_STATUS_UNCONSCIOUS), PROC_REF(on_sever_connection))

code/modules/events/wizard/shuffle.dm

@@ -87,7 +87,7 @@
 	var/list/mobs_to_swap = list()
 
 	for(var/mob/living/carbon/human/alive_human in GLOB.alive_mob_list)
-		if(alive_human.stat != CONSCIOUS || !alive_human.mind || IS_WIZARD(alive_human))
+		if(alive_human.stat != CONSCIOUS || isnull(alive_human.mind) || IS_WIZARD(alive_human) || HAS_TRAIT(alive_human, TRAIT_NO_MINDSWAP))
 			continue //the wizard(s) are spared on this one
 		mobs_to_swap += alive_human
 

code/modules/spells/spell_types/pointed/mind_transfer.dm

@@ -55,9 +55,19 @@
 	if(!isliving(cast_on))
 		to_chat(owner, span_warning("You can only swap minds with living beings!"))
 		return FALSE
+
+	if(HAS_TRAIT(cast_on, TRAIT_MIND_TEMPORARILY_GONE))
+		to_chat(owner, span_warning("This creature's mind is somewhere else entirely!"))
+		return FALSE
+
+	if(HAS_TRAIT(cast_on, TRAIT_NO_MINDSWAP))
+		to_chat(owner, span_warning("This type of magic can't operate on [cast_on.p_their()] mind!"))
+		return FALSE
+
 	if(is_type_in_typecache(cast_on, blacklisted_mobs))
 		to_chat(owner, span_warning("This creature is too [pick("powerful", "strange", "arcane", "obscene")] to control!"))
 		return FALSE
+
 	if(isguardian(cast_on))
 		var/mob/living/simple_animal/hostile/guardian/stand = cast_on
 		if(stand.summoner && stand.summoner == owner)