Option names passed to `statix` are missing dashes

[adomixaszvers]

Changes made in #503 introduced a call to lib.cli.toGNUCommandLineShell but it does not call mkOption on names so they are without dashes. I have reproduced the issue with expression

{
  pkgs ? import <nixpkgs> { },
}:
let
  inherit (pkgs) lib;
  settings = {
    format = [ "errfmt" ];
    ignore = [ "hardware-config.nix" ];
  };
in
{
  goodOptions = lib.cli.toGNUCommandLineShell { } settings;
  badOptions = lib.cli.toGNUCommandLineShell {
    mkList = name: value: [ name ] ++ lib.unique value;
  } settings;
}

.
Here goodOptions evaluates to '--format' 'errfmt' '--ignore' 'hardware-config.nix' and badOptions to 'format' 'errfmt' 'ignore' 'hardware-config.nix'.