Add AGPLv3 Xonotic website LICENSE.txt and licenses for self-hosted components
Font Awesome LICENSE.txt is already included
Foundation LICENSE source: https://raw.githubusercontent.com/foundation/foundation-sites/v5/LICENSE
Xolonium COPYING.txt source: https://gitlab.com/xonotic/mediasource/-/raw/master/fonts/xolonium/xonotic/COPYING.txt
Xolonium README.txt source: https://gitlab.com/xonotic/mediasource/-/raw/master/fonts/xolonium/xonotic/README.txt
PT Free Font License_eng_1.2.txt source: https://company.paratype.com/system/attachments/630/original/ptsansweb.zip
jQuery LICENSE.txt (MIT) source: https://github.com/jquery/jquery/raw/main/LICENSE.txt
All JavaScript files in static/static/js/vendor/ are MIT licensed.
Font files are moved into subdirectories for grouping with their license files.
Edited by bones_was_here