Updates for Docsy branch

• Updates landing text (open to suggestions @simonspa)
• Self-host Google Fonts (see e.g. https://www.golem.de/news/landgericht-muenchen-einbindung-von-google-fonts-ist-rechtswidrig-2202-162826.html)
• Updated favicons as they are currently buggy
• Documentation of the webEOS setup so that we don't forget what we did

With this MR the new website is ready to deply once v3 is released 🎉