Add a health check to confirm that rosetta was installed · juspay/nix-health#26

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Some projects explicitly use x86_64-darwin packages even on ARM macs:

Without installing rosetta, the dev would see:

For this, we need to add a check to verify that Nix can build packages for x86_64-darwin.

It might be worth doing this in a more general fashion, by calling the health check canBuildFor. So nammayatri flake can contain:

{ 
  nix-health.default = {
    can-build-for.systems."aarch64-darwin" = [ "x86_64-darwin" ];
  };
}

Or, if that's an overkill, we can just check that rosetta was installed, which would then look like:

{
  nix-health.default = {
    rosetta = {
      installed = true;
    };
  };
}

Research direction: Decide between a generic 'canBuildFor' check or a specific rosetta check. If generic, implement a way to specify target systems and verify Nix can build for them. If specific, check if rosetta is installed using a command like 'softwareupdate history'. Integrate the check into the existing health check framework, possibly by adding a new check function. Test on an ARM Mac with rosetta installed and without.
Tech stack: rust
Domain: devops
Issue type: Feature
Difficulty: 3
Estimated time: Half day
Activity status: Active
Clarity: Clear
Prerequisites: NixRust
Newbie friendliness: 70