No new documentation for breaking feature store changes in 3.0.1

[vjp23]

Version 3.0.1 was recently released, with breaking changes (apparent removal of the sagemaker.feature_store module) for feature store.

The Python SDK documentation has not been updated to include documentation for version 3.0.1.

The README suggests checking out the v3-examples folder for "documentation," but there are no examples for interacting with feature store objects.

Don't y'all think it might be helpful to show users how to use this new thing you built?