Usage: sub-settings [--config-file FILE_PATH] --foo-bar-quux STR

example with a sub settings

Available settings:
  Show this help text
  switch: -h|--help

  Output version information: 0.0.0
  switch: --version

  Path to the configuration file
  option: --config-file FILE_PATH
  env: CONFIG_FILE FILE_PATH

  Example with sub-settings
  option: --foo-bar-quux STR
  env: FOO_BAR_QUUX STR
  config:
    foo.bar.quux: # or null
      <string>