[options] add '--sleep-skip' option (#6582)

https://github.com/mikf/gallery-dl/issues/6582#issuecomment-3677460485

gallery_dl/option.py

@@ -528,6 +528,11 @@ def build_parser():
               "This can be either a constant value or a range "
               "(e.g. 2.7 or 2.0-3.5)"),
     )
+    downloader.add_argument(
+        "--sleep-skip",
+        dest="sleep-skip", metavar="SECONDS", action=ConfigAction,
+        help=("Number of seconds to wait after skipping a file download"),
+    )
     downloader.add_argument(
         "--sleep-request",
         dest="sleep-request", metavar="SECONDS", action=ConfigAction,