DoubleML - Unit tests for alignment of the Python and R package

• This repo contains unit tests to check for alignment of the Python and R package DoubleML.
• Checks are performed with github actions.
• Test are cron-scheduled.
• The released versions of both packages from CRAN and PyPI are checked against each other.
• The dev versions of both packages obtained from https://github.com/DoubleML/doubleml-for-py and https://github.com/DoubleML/doubleml-for-r are also checked against each other.