Make `nix search` be able to use search.nixos.org 's cache

Is your feature request related to a problem?

nix search can take a long time to complete, while its work is constantly updated on NixOS Search - Packages https://search.nixos.org/ / https://github.com/nixos/nixos-search ; making it one of the reason users might go directly on https://search.nixos.org/ and not use this command at all

Proposed solution

Make nix search be able to use search.nixos.org 's cache , given a flag is passed

Additional context

Related :

• #8603

Checklist

• checked latest Nix manual (source)
• checked open feature issues and pull requests for possible duplicates

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