Add comma

> Comma runs software without installing it.
>
> Basically it just wraps together nix shell -c and nix-index. You stick a , in front of a command to run it from whatever location it happens to occupy in nixpkgs without really thinking about it.

https://github.com/nix-community/comma

users/opdavies.nix

@@ -22,6 +22,7 @@ with lib;
       ++ optional config.cli.podman.enable "podman";
 
     packages = with pkgs; [
+      comma
       qrencode
     ];