flake search should include more fields

[raboof]

https://search.nixos.org/flakes?query=analyses finds octopin but https://search.nixos.org/flakes?query=octopin doesn't

[Malix-Labs]

Also,

#1033 (comment) from @dyegoaurelio :

Embers shows up if we search for one of it's packages search.nixos.org/flakes?channel=25.05&query=zatackax