Horizon engines now actually shoot fire (#27287)

* Code part of it

* Maps

* Compile options

* more space

* Tweaks

* Atmos

* Veers' Horizon

* Horizon map conflicts

* Fixes conflicts in tgm

* Remove

* .dme

code/controllers/subsystem/engines.dm

@@ -0,0 +1,30 @@
+var/datum/subsystem/engines/SSengines
+
+
+/datum/subsystem/engines
+	name          = "Engines"
+	wait          = SS_WAIT_ENGINES
+	flags         = SS_NO_INIT | SS_KEEP_TIMING
+	priority      = SS_PRIORITY_ENGINES
+	display_order = SS_DISPLAY_ENGINES
+
+
+/datum/subsystem/engines/New()
+	NEW_SS_GLOBAL(SSengines)
+
+/datum/subsystem/engines/fire(resumed = FALSE)
+	if(flags & SS_NO_FIRE)
+		return
+	if(map.has_engines)
+		if (!ship_has_power)
+			return FALSE
+		for (var/obj/structure/shuttle/engine/propulsion/horizon/engine in large_engines)
+			if (!istype(get_area(engine), /area/maintenance/engine))
+				continue
+			spawn() // So that they fire all at once.
+				engine.shoot_exhaust(3, 0)
+
+	else
+		flags |= SS_NO_FIRE
+		pause()
+		message_admins("Engines subsystem was paused due to lack of engines.")