Adding toml-based configuration for sphinx

I don't like conf.py This is a sphinx extension to reduce conf.py to: ` extensions = ["sphinx_tomlconf"] ` And put everything else in sphinx.toml

• Source: https://github.com/sphinx-contrib/sphinxcontrib-tomlconf
• Bugs: https://github.com/sphinx-contrib/sphinxcontrib-tomlconf/issues