fix: refuse a --bios-dir that does not exist

scripts/identity.py

@@ -151,6 +151,9 @@ def main() -> int:
         "--strict", action="store_true", help="exit non-zero when any is found"
     )
     args = parser.parse_args()
+    from common import require_directory  # noqa: PLC0415
+
+    require_directory(args.bios_dir)
 
     duplicates = scan(args.bios_dir)
     if args.json: