feat: extraction of boundary types from various docstrings (#111)

Closes #48, closes #36, closes #35, closes #32, closes #31, closes #30,
closes #27, closes #8.
 

### Summary of Changes

SpaCy rules were generated to recognize named examples and extract the
resulting boundaries.

### Instructions for Manual Testing (if required)

1. Run `pytest` for `test_extract_boundary_values.py`.
2. Check the results of `pytest`.

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Co-authored-by: megalinter-bot <129584137+megalinter-bot@users.noreply.github.com>
Co-authored-by: Lars Reimann <mail@larsreimann.com>