Add calib. pat. coords. and area/ROI shapes to NORDIF calib. pat. original metadata

[hakonanes]

Description of the change

This PR adds the following information to the original_metadata of a returned EBSD signal with NORDIF calibration patterns (reading of a Setting.txt file):

• Calibration pattern coordinates
• Shapes of area (electron image) and region of interest (ROI)
• Area (electron) image

The coordinates and shapes are given both in terms of pixels in the area image and in terms of the actual navigation shape of the ROI.

This information is required to fit a plane of projection centers (PCs) to selected PCs determined from the calibration patterns.

Other change(s):

• Magnification is read correctly from EDAX h5ebsd files.

Progress of the PR

• Docstrings for all functions
• Unit tests with pytest for all lines
• Clean code style by running black via pre-commit

Minimal example of the bug fix or new feature

>>> import kikuchipy as kp
>>> s = kp.data.ni_gain0_calibration(allow_download=True)  # or kp.load("Setting.txt")
>>> s
<EBSD, title: Calibration patterns, dimensions: (9|480, 480)>
>>> s.original_metadata.as_dictionary()  # "nordif_header" entry is omitted
{'calibration_patterns': {'indices': array([[447, 425],
         [532, 294],
         [543, 573],
         [378, 596],
         [369, 308],
         [632, 171],
         [668, 704],
         [269, 696],
         [247, 152]]),
  'indices_scaled': array([[119, 113],
         [142,  78],
         [145, 153],
         [101, 159],
         [ 98,  82],
         [169,  46],
         [178, 188],
         [ 72, 186],
         [ 66,  41]])},
 'area': {'shape': (1000, 1000), 'shape_scaled': (267, 267)},
 'roi': {'origin': (185, 73),
  'shape': (558, 750),
  'origin_scaled': (49, 19),
  'shape_scaled': (149, 200)},
 'area_image': array([[144, 120, 165, ..., 255, 255, 252],
        [250, 222, 203, ..., 255, 255, 255],
        [255, 219, 186, ..., 249, 252, 255],
        ...,
        [120, 110, 116, ..., 121, 119, 118],
        [122,  99, 112, ..., 117, 127, 132],
        [122, 108, 121, ..., 112, 118, 122]], dtype=uint8)}

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.
• New contributors are added to release.py, .zenodo.json and
  .all-contributorsrc with the table regenerated.