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/game/area/areas.dm

@@ -1,5 +1,7 @@
 // Areas.dm
 
+GLOBAL_LIST_EMPTY(areas_by_type)
+
 /area
 	var/fire = null
 	var/atmos = 1
@@ -55,6 +57,11 @@
 	var/no_spoilers = FALSE // If true, makes it much more difficult to see what is inside an area with things like mesons.
 	var/soundproofed = FALSE // If true, blocks sounds from other areas and prevents hearers on other areas from hearing the sounds within.
 
+/area/New()
+	// Used by the maploader, this must be done in New, not init
+	GLOB.areas_by_type[type] = src
+	return ..()
+
 /area/Initialize()
 	. = ..()
 	luminosity = !(dynamic_lighting)