Fixes the arena shuttle by demodularising it (#11098)

* Update fun_balloon.dm

* Update bubblegum.dm

* Update shuttles.dm

* Update shuttles.dm

* Update emergency_arena.dmm

* Update mapping.dm

* de-modulizes arena into 2 files

* minor tweak to Gumdrop

* hopefully fixes maps

* this too

* fixes shuttle lights

* some fixes

* un-ocd engines

* engine

* arena

* makes wej's mood lighting work

* renames arena to "The Arena" so it doesn't show up on top of the list

Co-authored-by: pp <patpol4@protonmail.com>
Co-authored-by: alexkar598 <25136265+alexkar598@users.noreply.github.com>

code/controllers/subsystem/mapping.dm

@@ -121,6 +121,14 @@ SUBSYSTEM_DEF(mapping)
 		log_game("Reebe failed to load!")
 	for(var/datum/parsed_map/PM in reebes)
 		PM.initTemplateBounds()
+	//Load an Arena
+	errorList = list()
+	var/list/arenas = SSmapping.LoadGroup(errorList, "Arena", "templates", "arena.dmm", silent = TRUE)
+	if(errorList.len)	// arena failed to load
+		message_admins("A shuttle arena failed to load!")
+		log_game("A shuttle arena failed to load!")
+	for(var/datum/parsed_map/PM in arenas)
+		PM.initTemplateBounds()
 	// Add the transit level
 	transit = add_new_zlevel("Transit/Reserved", list(ZTRAIT_RESERVED = TRUE))
 	repopulate_sorted_areas()