WIP: specifying save file variables

src/dev-util/savegame.gd

@@ -1 +1,8 @@
-extends Node
+@tool
+class_name SaveGame extends Resource
+
+@export var current_room: State.rooms = 0
+@export var mementos_complete: int = 0
+@export var board_state: PackedScene
+@export var thumbnail: Texture2D = preload("res://import/interface-elements/empty_save_slot.png")
+@export var last_saved: Dictionary = Time.get_datetime_dict_from_system()