Allow to pass c/color and s/sizes to StereographicPlot.scatter()

[hakonanes]

Signed-off-by: Håkon Wiik Ånes hwaanes@gmail.com

Description of the change

Fixes #380.

It is only in StereographicPlot.scatter() we hard-coded in passing c and s to matplotlib.axes.Axes.scatter(), so it is only there this is handled.

See #390.

Progress of the PR

• Docstrings for all functions
• Unit tests with pytest for all lines
• Clean code style by running black via pre-commit
• Merge when Fix indexing/slicing into sliced CrystalMap #391 and Deprecate minimal/brittle "3D" functionality for crystal maps #392 are approved

Minimal example of the bug fix or new feature

The following raised errors before, but now works

>>> from orix import vector
>>> v = vector.Vector3d([[1, 1, 1], [1, 0, 0]])
>>> v.scatter(color=["C0", "C1"])  # Equivalent to passing c=["C0", "C1"]
>>> v.scatter(sizes=[10, 20])  # Equivalent to passing s=[10, 20]

For reviewers

• The PR title is short, concise, and will make sense 1 year later.
• New functions are imported in corresponding __init__.py.
• New features, API changes, and deprecations are mentioned in the unreleased
  section in CHANGELOG.rst.
• Contributor(s) are listed correctly in __credits__ in orix/__init__.py and in
  .zenodo.json.

[harripj]

Looks good to me! I have just one comment for consideration.

[hakonanes]

Thank you for reviewing, @harripj! I'll merge this myself once the other two referenced PRs have been approved.

[hakonanes]

Since #394 is already merged, I'll just merge this as well.