docs: def changelog_file_option_validator(ctx, param, value):
      """Checks that the given file path exists in the current working directory.
  
      Returns a :class:`~pathlib.Path` object. If the file does not exist raises
      a :class:`~click.UsageError` exception.
      """
  
      path = Path(value)
  
      if not path.exists():
          filename = click.style(path.name, fg="blue", bold=True)
          ctx.fail(
              "\n"
              f" {x_mark} Unable to find {filename}\n"
              '   Run "$ brau init" to create one'
          )
  
      return path