Refactored to be controller centric; added message buss pattern with early support eent types

scripts/controllers/spawn_system/spawn_controller.gd

@@ -1,16 +1,21 @@
-class_name SpawnController extends Node
+class_name SpawnController extends BaseController
 
 
 @export var jet_factory: JetFactory
 
 
 func _ready() -> void:
-	spawn_sides()
+	pass
 
+func _controller_message(event: BaseEvent) -> void:
+	if event is BaseCreateJetEvent:
+		if event is CreateAlliesJetEvent:
+			spawn_allies_jet()
+		elif event is CreateAxisJetEvent:
+			spawn_axis_jet()
+		elif event is CreateNeutralJetEvent:
+			spawn_neutral_jet()
 
-func spawn_sides() -> void:
-	spawn_allies_jet()
-	spawn_axis_jet()
 
 func spawn_neutral_jet():
 	var _jet = spawn_jet(
@@ -18,7 +23,7 @@ func spawn_neutral_jet():
 	)
 
 func spawn_allies_jet():
-	var _jet = spawn_jet(
+	var _jet = spawn_jet.call(
 		Globals.Faction.ALLIES, jet_factory.create_cpu_jet
 	)