Merge pull request #13772 from silicons/respawn_system_2

adds a respawn/return to lobby system, tweaks cryo to preserve everything instead of just ""important items""

code/modules/mob/living/death.dm

@@ -66,6 +66,10 @@
 	GLOB.alive_mob_list -= src
 	if(!gibbed)
 		GLOB.dead_mob_list += src
+	if(ckey)
+		var/datum/preferences/P = GLOB.preferences_datums[ckey]
+		if(P)
+			P.respawn_time_of_death = world.time
 	set_drugginess(0)
 	set_disgust(0)
 	SetSleeping(0, 0)