Azure Machine Learning Feature Store SDK

The `azureml-featurestore` package is the core SDK interface for Azure ML Feature Store, working alongside `azure-ai-ml` to provide a managed feature store experience. It enables the development of feature set specifications in Spark, listing and retrieving feature sets, generating and resolving feature retrieval specifications, and performing offline feature retrieval with point-in-time joins. The library is actively developed, with its current version being 1.2.2.