Fix two handed items from bricking hands when a user changes species (#29573)

* create flag to skip species transform reequip

* add to bitfield and change to 1<<15

code/modules/mob/living/carbon/human/human_mob.dm

@@ -1185,6 +1185,8 @@
 	for(var/thing in thing_to_check)
 		var/obj/item/I = get_item_by_slot(thing)
 		if(I)
+			if(I.flags & SKIP_TRANSFORM_REEQUIP)
+				continue
 			kept_items[I] = thing
 			item_flags[I] = I.flags
 			I.flags = 0 // Temporary set the flags to 0