feat: add gui scale

Difficult_Rocket/__init__.py

@@ -44,6 +44,9 @@ class DR_option(Options):
     debugging:         bool = False
     crash_report_test: bool = True
 
+    # window option
+    gui_scale: int = 1  # default 1 2 -> 2x 3 -> 3x
+
 
 class _DR_runtime(Options):
     """