`snow search` should be able to search all flake inputs

[aquifolly]

snow search appears to only search nixpkgs

[coopbri]

Thanks for opening this -- relevant discussion: https://discord.com/channels/1021080090676842506/1021088997310734396/1176404562228285470

[jakehamilton]

Some flakes introduce long eval times which can be troublesome if you're trying to search everything in the registry. I know this was an issue for flake init --pick in my setup since one flake depended on hercules-ci.