pkglists: support for options in pkglist

pkglists package now provides additional options for package lists. Supervisor should read those and support those.

It should be as easy as updating returned dictionary from pkglists and modifying update_pkglists to also modify other uci sections.

Please see https://gitlab.labs.nic.cz/turris/turris-build/merge_requests/51 and https://gitlab.labs.nic.cz/turris/turris-os-packages/merge_requests/151

Edited by Karel Koci
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information