* feat(docs): migrate to sphinx 7
feat(docs): add instant search
feat(docs): enable reproducible build with requirements.txt
fix(docs): warnings
WARNING: The pre-Sphinx 1.0 'intersphinx_mapping' format is deprecated and will be removed in Sphinx 8. Update to the current format as described in the documentation. Hint: "intersphinx_mapping = {'<name>': ('https://docs.python.org/', None)}".https://www.sphinx-doc.org/en/master/usage/extensions/intersphinx.html#confval-intersphinx_mapping
* feat(docs): add test build to GH CI
