run notebooks on coast repo

[thogar-computer]

Pull request checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes/features)
• Docs have been reviewed and added/updated if needed (for bug fixes/features)
  • Some docs updates need to be made in the COAsT-site repo, in a separate PR. See contributing to documentation for details.

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

The PO would like the notebooks to be run within the GitHub workflow

Issue URL: #552

What is the new behavior?

All the notebook GitHub actions have been copied over and slimed down to only run the notebooks (not moving the markdown and Images)

Checklist

• Code compiles correctly
• Created tests which fail without the change (if possible)
• All tests passing (pip install . && pytest unit_testing/unit_test.py -s)
• Extended the README/documentation, if necessary
• Added myself / the copyright holder to the AUTHORS file

Does this introduce a breaking change?

• Yes
• No

Other information

[thogar-computer]

We spilt out the notebook runner/converts in the coast-site repo so I have keep it the same here.... not sure if that'll mean a quicker run / better logging or if it just means a lot of repeated (wasted) compute...