Document geometry module and replace `zero` method with `default` (#3515)

Nothing earth-shattering here, but all our geometry types are now fully
documented.

Release Notes:

- N/A
d7473ad6e7Nathan Sobo committed on 12/6/2023, 7:52:41 PM· committed by GitHubparents5ebf1d9ac07e23
8 files changedLine totals unavailable