[feature request] Missing py.typed marker file to support type checking in compliance with PEP 561

[fdelu]

Is your feature request related to a problem? Please describe.
Yes. Mypy (type checking tool) prints the following error when importing azure.iot.device: Skipping analyzing "azure.iot.device": module is installed, but missing library stubs or py.typed marker.

Describe the solution you'd like
Adding the required py.typed empty marker files. See PEP 561.

Describe alternatives you've considered
Ignoring the error and stop type checking the library, although it's not ideal with such a simple fix.

Additional context
This was already fixed on the main SDK repo three years ago. See Issue #9572. There are several pull requests listed in that issue that added these marker files. I can try to create one for this repo if needed.

[cartertinney]

We will be looking at adding support for this in the next few months

[fdelu]

We will be looking at adding support for this in the next few months

Thanks! At first I thought the SDK just needed the marker files, but I later noticed that the actual type hints are needed, so I understand it's a bigger task than what I initially thought.

Do let me know if there's anything I can collaborate with. I'm not sure what's the best approach to do this knowing that this information is already present in the docstrings.

[cartertinney]

Merged to main in #1163

Will be included in the next release.

[cartertinney]

azure-iot-device version 2.13.0 is available now. Will close this issue - if anything is not working as expected, please open a new issue.