A Sphinx extension to add custom favicons

With Sphinx Favicon, you can add custom favicons to your Sphinx html documentation quickly and easily.

You can define favicons directly in your `conf.py`, with different `rel` attributes such as [`"icon"`] or [`"apple-touch-icon"`] and any favicon size.

The Sphinx Favicon extension gives you more flexibility than the standard `favicon.ico` supported by Sphinx. It provides a quick and easy way to add the most important favicon formats for different browsers and devices.