Port VOREStation PR 6914 Speed up map load significantly

- Set initialized = FALSE on unsimulated turfs that need to intialize.
- Most of area/New() to initialize
- Faster lookup of self-init on atoms
- Split air alarm and fire alarm files, move new to initialize
- Tweak decals and opacity

Co-authored-by: Aronai Sieyes <arokha@arokha.com>
Co-authored-by: Leshana <Leshana@users.noreply.github.com>

code/modules/admin/verbs/adminjump.dm

@@ -21,7 +21,7 @@
 	else
 		alert("Admin jumping disabled")
 
-/client/proc/jumptoturf(var/turf/T in turfs)
+/client/proc/jumptoturf(var/turf/T in world)
 	set name = "Jump to Turf"
 	set category = "Admin"
 	if(!check_rights(R_ADMIN|R_MOD|R_DEBUG|R_EVENT))

code/modules/admin/verbs/atmosdebug.dm

@@ -28,7 +28,7 @@
 
 	to_chat(usr, "Checking for overlapping pipes...")
 	next_turf:
-		for(var/turf/T in turfs)
+		for(var/turf/T in world)
 			for(var/dir in cardinal)
 				var/list/connect_types = list(1 = 0, 2 = 0, 3 = 0)
 				for(var/obj/machinery/atmospherics/pipe in T)

code/modules/admin/verbs/grief_fixers.dm

@@ -38,7 +38,7 @@
 		unsorted_overlays |= gas_data.tile_overlay[id]
 
 
-	for(var/turf/simulated/T in turfs)
+	for(var/turf/simulated/T in world)
 		T.air = null
 		T.overlays.Remove(unsorted_overlays)
 		T.zone = null