Replace tutorial notebooks with example scripts

[hakonanes]

Description of the change

This PR replaces our tutorial notebooks with example scripts. The rationale for this is described in #596.

There's a large number of line changes. Little, if any, of the documentation content has been changed, just transferred from notebooks to example scripts. Therefore, when reviewing, it should be enough to go through the documentation and see that nothing was incorrectly formatted, i.e. focus on structure, not content.

Replacements:

• clustering_across_fundamental_region_boundaries.ipynb -> orientations/clustering_across_fundamental_zone_boundaries.py
• clustering_misorientations.ipynb -> misorientations/clustering_misorientations.py
• crystal_directions.ipynb -> (split into many examples)
  • vectors/crystal_directions.py
  • vectors/crystal_plane_normals.py
  • vectors/zone_axes.py
  • vectors/trigonal_hexagonal_index_conventions.py
  • vectors/symmetrically_equivalent_directions_and_plane_normals.py
  • vectors/directions_and_planes_in_rotated_crystals.py
  • vectors/diamond_pole_figure.py
• Crystal map
• Inverse pole figures
• Point groups
• Pole density function
• S2 sampling
• Stereographic projection
• Uniform sampling of orientation space

Progress of the PR

• Docstrings for all functions
• Unit tests with pytest for all lines
• Clean code style by running black via pre-commit
• Convert remaining notebooks (see above)

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.

[review-notebook-app]

Check out this pull request on 

See visual diffs & provide feedback on Jupyter Notebooks.

---

Powered by ReviewNB