Move the inline <style> tags to https://invent.kde.org/websites/aether-sass

This is also a great opportunity to clean the css a bit (remove rules that are using id, convert to sass and create reusable css classes).

Kde.org repository: https://websvn.kde.org/trunk/www/sites/www/ can be cloned with svn co svn://anonsvn.kde.org/home/kde/trunk/www/sites/www

Sass repository: https://invent.kde.org/websites/aether-sass

Instructions to create a local setup can be found at https://community.kde.org/KDE.org/Local_Setup (you can safely ignore the bits about applications).

In case of problem, you can contact me in IRC/Matrix (#kde-www) with the username 'Carl Schwan'