Incorporate a pre-commit hook for numpydoc validation

[stefmolin]

At work, I built a thin wrapper around this repository, so we could run docstring validation checks with pre-commit. If it's of interest, I would like to incorporate a version of this into the numpydoc repository, so others can benefit from docstring validation at commit time.

[larsoner]

Sounds useful to me! @rossbar WDYT?

[rossbar]

+1 from me!

[stefmolin]

Great! I've initiated the internal review process with our open source program office. I will keep you posted.

[stefmolin]

I got the go ahead and have started working on this. I'm hoping to have a PR in next week.

[stefmolin]

I ended up not being able to use what I had built before, so I had to write it using a different strategy. I've been testing the basic functionality this week. I added the final piece I was planning as far as functionality today, so I will do more testing this week. The last thing is I have to do is make a test suite, but I'm planning to put in a draft PR this week to get some initial feedback.