🚚 Rename app main to bbs

🚚 Move settings into main
➕ Add django-rename-app

manage.py

@@ -3,7 +3,7 @@ import os
 import sys
 
 if __name__ == "__main__":
-    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "bbssite.settings")
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "bbs.settings")
 
     from django.core.management import execute_from_command_line