missing py.typed

[jogo-openai]

Describe the bug
project has some typoing but is missing the py.typed file as per https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-library-stubs-or-py-typed-marker

To Reproduce
Run mypy against the following snippet

import prometheus_api_client

 error: Skipping analyzing "prometheus_api_client": module is installed, but missing library stubs or py.typed marker  [import-untyped]
 note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports

Expected behavior
py.typed exists