use a precommit to clear notebooks

[hareball90]

clear notebook cells using nbstripout - should deal with changes to cell outputs counting as versioned changes

see data science qa notes for advice on usage

[twomagpi]

This should also run nbformat to address:

/opt/hostedtoolcache/Python/3.10.14/x64/lib/python3.10/site-packages/nbformat/init.py:96: MissingIDFieldWarning: Cell is missing an id field, this will become a hard error in future nbformat versions. You may want to use normalize() on your notebooks before validations (available since nbformat 5.1.4). Previous versions of nbformat are fixing this issue transparently, and will stop doing so in the future.