gd: added menu template

addons/maaacks_game_template/base/scripts/global_state_data.gd

@@ -0,0 +1,24 @@
+class_name GlobalStateData
+extends Resource
+
+@export var first_version_opened : String
+@export var last_version_opened : String
+@export var last_unix_time_opened : int
+@export var states : Dictionary
+
+func get_state(key_name : String, state_type_path : String) -> Resource:
+	var new_state : Resource
+	var new_state_script = load(state_type_path)
+	if new_state_script is GDScript:
+		new_state = new_state_script.new()
+	if key_name in states:
+		var saved_state : Resource = states[key_name]
+		var saved_script = saved_state.get_script()
+		var new_script = new_state.get_script()
+		if saved_script and new_script and saved_script == new_script:
+			return saved_state
+	states[key_name] = new_state
+	return new_state
+
+func has_state(key_name : String) -> bool:
+	return key_name in states