Add NRK core-icons & YR weather symbols

[hexahigh]

NRK core icons

Site: https://static.nrk.no/core-icons/latest/index.html Repo: https://github.com/nrkno/core-icons License: Icons & logos prefixed with nrk-logo- or nrk-super- are under a special license which requires attribution, everything else is under CC-BY-4.0 Notes: Icons can be found in the lib/logo lib/icon lib/preview and lib/expressive directories

YR weather symbols

Site: https://nrkno.github.io/yr-weather-symbols/ Repo: https://github.com/nrkno/yr-weather-symbols License: Attribution required, commercial use allowed. Notes: Icons can be found in the symbols directory. There are 3 variants, perhaps append/prepend a type? for example rainshowers-night-dark, rainshowers-night-light and rainshowers-night-shadow

Thank you for taking the time to review my request, i really appreciate the work that you do!