fixed saving & added first basic save creation menu

scripts/autoloads/windowman.gd

@@ -1,15 +1,15 @@
 extends Node
 
-var config: Config = Config.new()
+var config: Config = Config.new("config")
 
 func _ready() -> void: 
-	Save.load(config)
+	config.load()
 	toggle_fullscreen()
 
 func _process(_delta: float) -> void:
 	if Input.is_action_just_pressed("fullscreen"):
 		config.fullscreen = !config.fullscreen
-		Save.save(config)
+		config.save()
 		toggle_fullscreen()
 
 func _notification(what: int) -> void: