textproc/py-sphinx-gallery: Add py-sphinx-gallery 0.14.0

Sphinx-Gallery is a Sphinx extension that builds an HTML gallery of examples
from any set of Python scripts.

Features:

• Create example galleries automatically by running pure Python example scripts while capturing outputs + figures, rendering them into reST files built into your documentation by Sphinx
• Embed reST in your example Python files, allowing you to interweave narrative-like content with code that generates plots in your documentation. Sphinx-Gallery also automatically generates a Jupyter Notebook for each your example page.
• Add mini-galleries for API documentation. Sphinx-Gallery can generate mini-galleries listing all examples that use a particular function/method/etc.
• Add intersphinx links to your examples. Sphinx-Gallery can automatically add links to API documentation for functions/methods/classes that are used in your examples (for any Python module that uses intersphinx).
• Manage multiple galleries to create and embed galleries for several folders of examples.