Apache Airflow Apache Beam Provider

The `apache-airflow-providers-apache-beam` package provides operators and hooks to seamlessly integrate Apache Airflow with Apache Beam. Apache Beam is an open-source, unified model for defining both batch and streaming data-parallel processing pipelines. This provider enables Airflow users to define, schedule, and monitor Beam pipelines, which can then be executed by various Beam-supported backends such as Apache Flink, Apache Spark, or Google Cloud Dataflow. The provider follows a roughly 2-3 month minor release cadence, with patch releases issued on an as-needed basis.