Replaces bapi-dmm with /tg/'s modernest maploader (#19122)

* Replaces bapi-dmm with /tg/'s modernest maploader

* Fix workflows

code/modules/maps/map_template_vr.dm

@@ -0,0 +1,22 @@
+/// An asslist of name=z for map_templates that have been loaded
+GLOBAL_LIST_EMPTY(map_templates_loaded)
+
+/// Registers the map into GLOB.map_templates_loaded
+/datum/map_template/proc/on_map_preload(z)
+	if(name_alias)
+		GLOB.map_templates_loaded[name_alias] = z
+	else
+		GLOB.map_templates_loaded[name] = z
+
+/datum/map_template/proc/on_map_loaded(z)
+	//We missed air init!
+	if(SSair.initialized)
+		for(var/turf/simulated/T in block(locate(1,1,z), locate(world.maxx, world.maxy, z)))
+			T.update_air_properties()
+	//We missed sslighting init!
+	if(SSlighting.initialized)
+		for(var/Trf in block(locate(1,1,z), locate(world.maxx, world.maxy, z)))
+			var/turf/T = Trf //faster than implicit istype with typed for loop
+			T.lighting_build_overlay()
+
+	return