Refactor rhythm action architecture

resources/chart_track.gd

@@ -0,0 +1,17 @@
+class_name ChartTrack
+extends Resource
+
+@export var track_id: StringName = &""
+@export var track_type: StringName = &""
+@export var events: Array = []
+
+
+func sorted_events() -> Array:
+	var result: Array = []
+	for event in events:
+		if event is Resource:
+			result.append(event)
+	result.sort_custom(func(a: Resource, b: Resource) -> bool:
+		return float(a.call("beat_position")) < float(b.call("beat_position"))
+	)
+	return result