First major release of "Doxygen Awesome CSS"

Doxygen Awesome is a custom CSS theme for doxygen html-documentation with lots of customization parameters.

• 🌈 Clean, modern design
• 🚀 Heavily customizable by adjusting CSS-variables
• 🧩 No changes to the HTML structure of Doxygen required
• 📱 Improved mobile usability
• 🌘 Dark mode support!
• 🥇 Works best with doxygen 1.9.1