Provide a command for re-scanning old files

I'll leave to maintainers to decide if they first want to complete the 🌱 Code modernisation Active .

Needs more work. See comments in the merge request.

I will try and address the recent comments here.

$this->logger() was not working for me in the batch process, so I substituted \Drupal::logger() ... I'm not sure if it is working for other people?

Will do some more polishing myself.

Back to NR

tested and works as required

thanks for your contributions!