Stabilise nix store ping

[fricklerhandwerk]

This implements NixOS/rfcs#136. This issue is agreed-upon by the https://github.com/orgs/NixOS/teams/nix-team

Required changes:

• rename to nix store info
• return bool or null for the trusted field instead of currently int
  • if the underlying enum is converted to an enum struct, the potential to make this mistake will dissapear
• ensure that --json output fits the JSON guidelines

[nixos-discourse]

This issue has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/2023-09-04-nix-team-meeting-minutes-85/32608/1

[vicky1999]

Hello, I would like to work on this task. Can I start working on this?

[Ericson2314]

Yes you can!

[vicky1999]

@fricklerhandwerk
I have a doubt in point 2 (return bool or null for the trusted field instead of currently int):
Based on the comment, I have made the changes to display the true/false value for trusted value in store info and info json. Kindly let me know if this is the expectation.

[vicky1999]

@fricklerhandwerk The json payload, I saw that the json argument is not formatted. This will be fine. But, I think it will look more nicer if the json is formatted. So, I have made some changes to display the formatted json instead of single line json.

Kindly let me know if I can push this change to the current open PR (#8975 ).

[fricklerhandwerk]

I think it's good to have. Let's continue the conversation in the PR though. We'll assign one maintainer for review to keep everyone else's noise level low.