Sphinx-external-toc-strict

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- docs(_toc.yml): change to correct repo url
- fix(LICENSE): MIT --> Apache 2.0 Was always supposed to be Apache 2.0
- style(pyproject.toml): comment out setuptools-scm option, fallback_version
- docs: add links to pypi, github, issues, chat, changelog
- docs(README.rst): add badge last commit branch main

.. _changes_1-1-6:

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- ci(.gitignore): remove ignore of docs/*.inv
- ci(tox): in docs do not build_inv after clean_inv
- ci(pre-commit): remove remove-intersphinx-inventory-files, need docs/*.inv
- docs(Makefile): store *.inv needed by readthedocs
- docs: remove objects-python.txt, excessive file size
- docs: in code manual, add todo list page

.. _changes_1-1-5:

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- docs(Makefile): for targets build_inv and clean_inv only use relative paths
- docs(Makefile): for targets doctest and linkcheck require target build_inv

.. _changes_1-1-4:

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- ci(.readthedocs.yml): py311 --> py39, do not build pdf, and notes
- docs: defend assertions, links, in comparison table
- fix: sphinx conf option master_doc index --> intro
- docs: in comparison yaml dependency choice why and why not links
- ci(.gitignore): eventhough pre-commit remove, ignore docs/*.inv
- docs: advice on ramification of incorrectly set master_doc value
- docs: add note sphinx extension sphinx-multitoc-numbering not working
- docs: add logo files sphinx-external-toc-strict-logo.*
- docs(credit.txt): document static asset authors and license
- docs(_toc.yml): remove unnecessary captions. Rearrange ToC order
- docs(user_guide/api.rst): in example fix python code
- docs(regressions.rst): add known regressions page, a markdown file

.. _changes_1-1-3:

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- ci(.readthedocs.yml): python.install.requirements list rather than dict
- style(pyproject.toml): configure project.urls
- docs(README.rst): github-ci badge use workflow release
- docs(README.rst): add badges

.. _changes_1-1-2:

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- ci(test-coverage.yml): bump version codecov/codecov-action
- ci(release.yml): bump version sigstore/gh-action-sigstore-python
- docs(.readthedocs.yml): during pre_build create inv files
- fix(pyproject.toml): tool.black may not contain target_version
- test(test_sphinx.py): ensure do not hardcode extension name
- fix(constants.py): g_app_name should contain underscores not hyphens
- fix(pyproject.toml): tool.mypy turn off warn_unused_ignores

.. _changes_1-1-1: