refactor: Improve visual style using Pico.css
This is a comprehensive refactor of visual style using Pico.css framework as well as extension of functionality to match latest development of arepo.
Features:
- better visual style using minimalist Pico.css with semantic HTML
- support dark/light themes, resepct browser preference
- smoother page load
- persistent links to projects
- repo selection only shown for projects with multiple repos
- icons for Debian/Ubuntu
- separate data file for all repo data (repos.yaml)
- data import directly from arepo (import_arepo.sh)
- proper repo sorting (by distro and version)
- less intrusive Automated repo setup section (now Accordion)
- added Pin step for Knot DNS