code: def show(dataset_uri):
      
      try:
          dataset = dtoolcore.ProtoDataSet.from_uri(
              uri=dataset_uri,
              config_path=CONFIG_PATH
          )
      except dtoolcore.DtoolCoreTypeError:
          dataset = dtoolcore.DataSet.from_uri(
              uri=dataset_uri,
              config_path=CONFIG_PATH
          )
      readme_content = dataset.get_readme_content()
      click.secho(readme_content)
docs: Show the descriptive metadata in the readme.