feat: add ability to run commands after a cell

[tekumara]

resolves #93

[codecov[bot]]

Codecov Report

Merging #94 (3e04704) into main (966edac) will increase coverage by 0.27%. The diff coverage is 91.42%.

@@            Coverage Diff             @@
##             main      #94      +/-   ##
==========================================
+ Coverage   92.46%   92.73%   +0.27%     
==========================================
  Files           4        4              
  Lines         146      179      +33     
==========================================
+ Hits          135      166      +31     
- Misses         11       13       +2     

Impacted Files	Coverage Δ
src/nbmake/pytest_items.py	88.46% <ø> (ø)
src/nbmake/pytest_plugin.py	91.66% <83.33%> (-3.08%)	:arrow_down:
src/nbmake/nb_run.py	94.62% <93.10%> (+0.77%)	:arrow_up:

[alex-treebeard]

Thanks @tekumara, this is an awesome contribution and it looks like it's safe to merge (some CI checks are failing but I need to do some maintenance on them).

Out of interest, what's the origination of this use case? e.g. Are we trying to (a) generate runnable docs, (b) maintain some operational tool, or (c) validate the proof of concept/prototype code works?

[tekumara]

👍 I'd like to use this for runnable docs... The docs include an authentication step that end users need to perform, but in order to make it work in CI there is an auth dance that differs from what the end user would do (eg: it uses a service account rather than the user's account). So I'd like to keep the CI auth setup hidden.

[alex-treebeard]

Great, thanks again. Released in https://github.com/treebeardtech/nbmake/releases/tag/v1.4

We need to follow up with some docs and CI fixes (I'll take a look in the next week)

[tekumara]

Awesome thank you!