Add docstrings checking with ruff and implement the fixes#196

PartiallyUntyped merged 4 commits intolszecsi/refactoring-rieaws/aws-lambda-python-runtime-interface-client:lszecsi/refactoring-riefrom

lszecsi/refactoring-docstraws/aws-lambda-python-runtime-interface-client:lszecsi/refactoring-docstrCopy head branch name to clipboard