Download links should have visual annotations in CSS

[kayhayen]

Please consider adding CSS for the various suffixes on the web page, with proper symbols for PDFs, zip files etc from Fontawesome for definitely all of https://nuitka.net/doc/download.html but probably all types of downloads ideally for the whole site.

I noticed this looking at https://youtube.com/shorts/3p0dmlAwaRQ?si=VmR2gNiB0dmz9pFL where it's layed out how to do it. We probably might DO want to have an automatic inlining for the CSS for images after all, such that SVG images become easier to maintain in CSS.