Add cutscene change event

scripts/Cutscene/CutsceneEvent.gd

@@ -6,7 +6,7 @@ func _init() -> void:
 	pass
 
 func start() -> void:
-	pass
+	started = true
 
 func update(delta:float) -> void:
 	pass
@@ -16,3 +16,6 @@ func isDone() -> bool:
 
 func end() -> void:
 	pass
+
+func reset() -> void:
+	started = false