conform Nixago Presets

{
  commit = {
    header = {length = 89;};
    conventional = {
      types = [
        "build"
        "chore"
        "ci"
        "docs"
        "feat"
        "fix"
        "perf"
        "refactor"
        "style"
        "test"
      ];
      scopes = [];
    };
  };
}

If you have a good idea how to make these presets more useful, please consider to submit a PR.