Add bapi-dmm to reduce startup time by... a lot (#16148)

* Add bapi-dmm, a rust maploader that goes BRRRRRRR

* A few more maps switched away from file paths

* Update to include 48f4879d8704cb057a (better path error handling)

code/modules/maps/bapi-dmm/bapi_helpers.dm

@@ -0,0 +1,110 @@
+// Internal bapi-dmm helpers
+/datum/bapi_parsed_map/proc/_bapi_add_warning(warning)
+	loaded_warnings += list(warning)
+
+/datum/bapi_parsed_map/proc/_bapi_expand_map(x, y, z, new_z, z_offset)
+	if(x > world.maxx)
+		expanded_x = TRUE
+		world.maxx = x
+		// if(new_z)
+		// 	world.increase_max_x(x, map_load_z_cutoff = z_offset - 1)
+		// else
+		// 	world.increase_max_x(x)
+	if(y > world.maxy)
+		expanded_y = TRUE
+		world.maxy = y
+		// if(new_z)
+		// 	world.increase_max_y(y, map_load_z_cutoff = z_offset - 1)
+		// else
+		// 	world.increase_max_y(y)
+	if(z > world.maxz)
+		while(world.maxz < z)
+			world.increment_max_z()
+
+/proc/_bapi_helper_get_world_bounds()
+	. = list(world.maxx, world.maxy, world.maxz)
+
+/proc/_bapi_helper_text2path(text)
+	. = text2path(text)
+
+/proc/_bapi_helper_text2file(text)
+	. = file(text)
+
+/proc/_bapi_create_atom(path, crds)
+	set waitfor = FALSE
+	. = new path (crds)
+
+/proc/_bapi_setup_preloader(list/attributes, path)
+	world.preloader_setup(attributes, path)
+
+/proc/_bapi_apply_preloader(atom/A)
+	if(GLOB.use_preloader)
+		world.preloader_load(A)
+
+/proc/_bapi_new_atom(text_path, turf/crds, list/attributes)
+	var/path = text2path(text_path)
+	if(!path)
+		CRASH("Bad atom path [text_path]")
+
+	if(attributes != null)
+		world.preloader_setup(attributes, path)
+
+	var/atom/instance = _bapi_create_atom(path, crds) // first preloader pass
+
+	if(GLOB.use_preloader && instance) // second preloader pass for atoms that don't ..() in New()
+		world.preloader_load(instance)
+
+/proc/_bapi_create_or_get_area(text_path)
+	var/path = text2path(text_path)
+	if(!path)
+		CRASH("Bad area path [text_path]")
+
+	var/area/area_instance = GLOB.areas_by_type[path]
+	if(!area_instance)
+		area_instance = new path(null)
+		if(!area_instance)
+			CRASH("[path] failed to be new'd, what'd you do?")
+
+	return area_instance
+
+/proc/_bapi_handle_area_contain(turf/T, area/A)
+	// var/area/old_area = T.loc
+	// if(old_area == A)
+	// 	return // no changing areas that already contain this turf, it'll confuse them
+	// LISTASSERTLEN(old_area.turfs_to_uncontain_by_zlevel, T.z, list())
+	// LISTASSERTLEN(A.turfs_by_zlevel, T.z, list())
+	// old_area.turfs_to_uncontain_by_zlevel[T.z] += T
+	// A.turfs_by_zlevel[T.z] += T
+
+/proc/_bapi_create_turf(turf/crds, text_path, list/attributes, place_on_top, no_changeturf)
+	var/path = text2path(text_path)
+	if(!path)
+		CRASH("Bad turf path [text_path]")
+
+	if(attributes != null)
+		world.preloader_setup(attributes, path)
+
+	var/atom/instance
+	if(no_changeturf)
+		instance = _bapi_create_atom(path, crds)
+	else
+		instance = crds.ChangeTurf(path, FALSE, TRUE)
+
+	if(GLOB.use_preloader && instance) // second preloader pass for atoms that don't ..() in New()
+		world.preloader_load(instance)
+
+/proc/_bapi_add_turf_to_area(area/A, turf/T)
+	if(!A || !T)
+		return
+	A.contents.Add(T)
+
+/proc/_bapi_helper_get_world_type_turf()
+	return "[world.turf]"
+
+/proc/_bapi_helper_get_world_type_area()
+	return "[world.area]"
+
+/// Implement this to have bapi-dmm sleep occasionally
+/// by returning true
+/proc/_bapi_helper_tick_check()
+	return TICK_CHECK