Flake support on nixos search

I am proud to say that (experimental) flake support for nixos search has finally landed!

The list of flakes indexed is taken care of manually at [nixos-search/manual.toml at af3b49421784fa557b90acffef08168d43d2a699 · NixOS/nixos-search · GitHub] with automated indexing coming soon.

Thanks to @garbas @tomberek and @samueldr for the supervision


Can you suggest a search term? I tried nickel and got no results.

Nickel should have been there but wasn’t found because the frontend searched on an old index.
#353 will fix that.