chore(gen): Add py.typed to python sdk

[devsjc]

• Have you followed the Open Climate Fix Contribution Guidelines?
• Have you referenced the Issue this PR addresses?
• Have you checked to ensure there aren't other open Pull Requests for the same change?
• Have you added a summary of the changes?
• Have you written new tests for your changes?.
• Have you successfully run make lint with your changes locally?
• Have you successfully run make gen with your changes locally?
• Have you successfully run make test with your changes locally?

Adds py.typed marker to geenrated python sdk.