Add type annotations to rotation.py

[fmuenkel]

Overview: What does this pull request change?

More work on #3375

Motivation and Explanation: Why and how do your changes improve the library?

Links to added or changed documentation pages

Further Information and Comments

Reviewer Checklist

• The PR title is descriptive enough for the changelog, and the PR is labeled correctly
• If applicable: newly added non-private functions and classes have a docstring including a short summary and a PARAMETERS section
• If applicable: newly added functions and classes are tested

[chopan050]

Thanks for your contribution! I request some small changes:

[chopan050]

We need to also include the possibility of None in the typehint, given that that's the default value.

Taking a look at path_along_circles(): back in the day, I typed the circles_centers parameter as Point3DLike_Array, based on the name (plural) and how the parameter was used inside that function. Now, upon closer inspection and noticing how Rotation.__init__() and test_TransformWithPathArcCenters() decide to pass a single point rather than an array of points, I realize that circles_centers can actually be Point3DLike | Point3DLike_Array. Thus, the type of path_arc_centers should actually be:

Suggested change

	path_arc_centers: Point3DLike = None,
	path_arc_centers: Point3DLike | Point3DLike_Array | None = None,

Feel free to also modify the typehints for path_along_circles() if you want to!

[fmuenkel]

Did the changes here, but I will have a look at the rest of transform.py as well in a separate PR.

[chopan050]

LGTM!