add --print-out-paths,--out-link, --profile to nix copy

[arianvp]

Describe the bug

Currently if you do nix copy my-flake#myattr --from ssh-ng://my-host there is no way to tell where the copy went to? No nix store path is printed and no result symlink is created. How am I supposed to know where the path came from without an additional nix path-info ?

Steps To Reproduce

nix copy and not know where the path was copied from

Expected behavior

I should be able to do:

nix copy --from ssh-ng://builder .#myattr --print-out-paths
nix copy --from ssh-ng://builder .#myattr --out-link result
nix copy --from ssh-ng://builder .#myattr --profile my-profile

nix-env --version output

Additional context

Add any other context about the problem here.

Priorities

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[arianvp]

I now do

 nix build --eval-store auto --store ssh-ng://utm.local  .#hydraJobs.builder && nix copy --from ssh-ng://utm.local .#hydraJobs.builder --no-check-sigs && nix build .#hydraJobs.builder

as a workaround but it feels massively hackey