Add: Added support for hard map

- Now is possible cleared a hard map like a normal map

module/config/argparser_en.py

@@ -326,6 +326,7 @@ def main(ini_name=''):
     # 选择关卡
     stage = main_parser.add_argument_group('Choose a level', 'Main campaign, Currently, not all maps are being supported, check the folder /doc/development_en.md to know how add new maps')
     stage.add_argument('--main_stage', default=default('--main_stage'), help='E.g 7-2')
+    stage.add_argument('--enable_hard_main_campaign', default=default('--enable_hard_main_campaign'), help='Useful if you want to clear a hard mode map', choices=['normal', 'hard'])
 
     # ==========event==========
     event_parser = subs.add_parser('event')