Add --debug-transforms flag

PFERD/cli/parser.py

@@ -164,6 +164,11 @@ PARSER.add_argument(
     help="dump current configuration to a file and exit."
     " Use '-' as path to print to stdout instead"
 )
+PARSER.add_argument(
+    "--debug-transforms",
+    action="store_true",
+    help="apply transform rules to files of previous run"
+)
 PARSER.add_argument(
     "--crawler", "-C",
     action="append",