Add option `--no-break-on-existing` (#9610)

Authored by: bashonly

README.md

@@ -481,6 +481,9 @@ If you fork the project on GitHub, you can run your fork's [build workflow](.git
     --max-downloads NUMBER          Abort after downloading NUMBER files
     --break-on-existing             Stop the download process when encountering
                                     a file that is in the archive
+    --no-break-on-existing          Do not stop the download process when
+                                    encountering a file that is in the archive
+                                    (default)
     --break-per-input               Alters --max-downloads, --break-on-existing,
                                     --break-match-filter, and autonumber to
                                     reset per input URL

yt_dlp/options.py

@@ -691,6 +691,10 @@ def create_parser():
         '--break-on-existing',
         action='store_true', dest='break_on_existing', default=False,
         help='Stop the download process when encountering a file that is in the archive')
+    selection.add_option(
+        '--no-break-on-existing',
+        action='store_false', dest='break_on_existing',
+        help='Do not stop the download process when encountering a file that is in the archive (default)')
     selection.add_option(
         '--break-on-reject',
         action='store_true', dest='break_on_reject', default=False,