TYP: add type annotations to a couple utility functions in nddata - #16546

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Thanks for your feedback @eerovaher. I should have addressed all your comments

switching to draft while I figure out how to make sphinx happy

rebased to fix a trivial conflict

rebased again to refresh CI and fix conflicts. This shouldn't block 7.0 (obviously), so I'm going to move it to 7.1

Hi humans 👋 - this pull request hasn't had any new commits for approximately 4 months. I plan to close this in 30 days if the pull request doesn't have any new commits by then.

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@mwcraig @bmorris3 @larrybradley can I get eyes on this ?

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There are conflicts now. Would need rebase, which will also give you a few more months.

Hi humans 👋 - this pull request hasn't had any new commits for approximately 5 months. I plan to close this in 30 days if the pull request doesn't have any new commits by then.

In lieu of a stalled pull request, please consider closing this and open an issue instead if a reminder is needed to revisit in the future. Maintainers may also choose to add keep-open label to keep this PR open but it is discouraged unless absolutely necessary.

If this PR still needs to be reviewed, as an author, you can rebase it to reset the clock.

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sorry about the delay in my reply. I've updated the PR as suggested by @mwcraig but also replaced numbers protocols with simple float and complex annotations, which I find better suited in situations where numpy types are accepted. This should be ready for final review now 🤞🏻

@eerovaher this has approval from the sub-package maintainer. If you rebase, I think we can get this in.

I just rebased, fwiw