[FR] Add selfhst/icons as icon pack

[bannert1337]

Why would this be useful?
This would add a new popular option for icon packs, which contains many high-quality icons both colored and monochrome.

https://github.com/selfhst/icons/

[johansan]

Thanks. A bit reluctant adding so new icon packs. Once added I can't remove them easily. Will wait a bit. Added to backlog.