Envoy Data Plane API Python Dataclasses

The `envoy-data-plane` library provides Python dataclasses that represent the Envoy Data-Plane API. It is designed to be a helper for generating Envoy configuration using Python scripts, offering benefits like IDE autocompletion and basic validation for custom Envoy control planes. The library is a conversion of the official `envoyproxy/data-plane-api` definitions into Python dataclasses, typically leveraging a tool like `betterproto`.