Add keyboardio keyboard support

[turion]

Description of changes

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 24.11 Release Notes (or backporting 23.11 and 24.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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[nixos-discourse]

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

https://discourse.nixos.org/t/prs-ready-for-review/3032/4693

[maralorn]

I have this in my config: https://code.maralorn.de/maralorn/config/src/branch/main/nixos/roles/clients/chrysalis.nix and my chrysalis starts and works fine.

Were you aware of that approach? Is your solution here better?

[turion]

Were you aware of that approach?

No, yours seems much cleaner. I would have tried that, had I known.

Is your solution here better?

Not sure, probably not. If the chrysalis package has all the required udev rules, then there is no point in hand-copying them from complicated-to-explain sources. Also, this set of rules would then likely be maintained.

Do you think it's worth adding your solution as the config option I've declared here? Because if it works for me as well, that's what I'd do.

[maralorn]

A config option would be great for discoverability so I am in favor. Does not seem very important either, though …