Please add `--no-new-version-warning` option

There is a warning whenever we run `vsce` because `vsce` is updated so often. An option like `--no-new-version-warning` would be helpful to suppress that warning, especially for CI systems.

<img width="1058" height="121" alt="Image" src="https://github.com/user-attachments/assets/2deabf3e-6f1b-46ae-ad69-cb1093ed340f" />