`yield` fixture decorated with `@keyword` does not get executed

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from __future__ import annotations

from pytest import fixture
from robot.api import logger

from pytest_robotframework import keyword


@fixture
@keyword
def foo():
    logger.info("setup")  # doesn't get run
    yield "asdf"
    logger.info("teardown")  # doesn't get run


def test_foo(foo: str):
    logger.info(foo)  # prints <generator object foo at 0x73543ca43280> instead of "asdf"

it's not clear what decorating such a fixture as a @keyword is even supposed to do. so it should probably just be an error (ideally both a type error and a runtime error)