* update the fast FullBlock parser (that just skips fields) to support the new serialization of RewardChainBlock
* add test and shard the test, to enable it running in parallel
* disable expensive tests on MacOS Intel
* document some aspects of the full_blocks_utils test
* configure isort to add the future annotations import
* apply the new isort setting
* remove type ignores for new mypy (#13539)
https://pypi.org/project/mypy/0.981/
* another
* make recurse_jsonify() work directly on types, circumventing the dataclasses.asdict() step. This enables simpler integration of non dataclasses into the Streamable and JSON protocols
* add benchmark for Streamable.to_json_dict()