Mecha refactor 2020 (#52902)

-Mechs are a vehicle subtype
-Mech equipment half-rewritten
-Mech actions completely redone
-Cooldown macros
-New movement macros & replacing all var in GLOB.diagonals with ISDIAGONALDIR(var)
-New lazylist macro
-Support for lavaland only mechs
-Removed the tank because fuck off with that hacky shit
-Documentation
-Fuckton of fixes

code/modules/shuttle/supply.dm

@@ -206,7 +206,7 @@ GLOBAL_LIST_INIT(blacklisted_cargo_types, typecacheof(list(
 				continue
 			if(bounty_ship_item_and_contents(AM, dry_run = FALSE))
 				matched_bounty = TRUE
-			if(!AM.anchored || istype(AM, /obj/mecha))
+			if(!AM.anchored || istype(AM, /obj/vehicle/sealed/mecha))
 				export_item_and_contents(AM, export_categories , dry_run = FALSE, external_report = ex)
 
 	if(ex.exported_atoms)

code/modules/shuttle/white_ship.dm

@@ -51,6 +51,6 @@
 
 /obj/effect/spawner/lootdrop/whiteship_cere_ripley
 	name = "25% mech 75% wreckage ripley spawner"
-	loot = list(/obj/mecha/working/ripley/mining = 1,
+	loot = list(/obj/vehicle/sealed/mecha/working/ripley/mining = 1,
 				/obj/structure/mecha_wreckage/ripley = 5)
 	lootdoubles = FALSE