/atom New() => Initialize() [MDB IGNORE] (#8298)

* Find and replace argless atom New() to Initialize().

* Manual replacement of no-arg New() to Initialize().

* Manually replacing remaining New() overrides.

* Fixing linter issues with now-removed New() args.

* Tidying area init overrides.

* Porting Neb's atom subsystem.

* Trying to isolate init problems.

* Adjusting Init code post-test.

* Merging duplicate Initialize() procs.

* Merge resolution.

code/modules/multiz/ladders.dm

@@ -14,7 +14,11 @@
 	var/const/climb_time = 2 SECONDS
 
 /obj/structure/ladder/Initialize()
-	. = ..()
+	..()
+	return INITIALIZE_HINT_LATELOAD
+
+/obj/structure/ladder/LateInitialize()
+	..()
 	// the upper will connect to the lower
 	if(allowed_directions & DOWN) //we only want to do the top one, as it will initialize the ones before it.
 		for(var/obj/structure/ladder/L in GetBelow(src))