Simbench

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- [FIXED] Bringing together develop and master with all changes of the release process
- [ADDED] generalization and test for auxiliary function :code:`to_numeric_ignored_errors()`

- [CHANGED] readded copyright notice to setup.py and updated date
- [CHANGED] added prune to MANIFEST.in to exclude doc and tutorials from wheel builds
- [CHANGED] removed gitlab ci files from MANIFEST.in to keep them out of wheel builds
- [CHANGED] updated pyproject.toml to fix build issues
- [CHANGED] updated upload_release.yml to not call setup.py anymore (see https://packaging.python.org/en/latest/discussions/setup-py-deprecated/)
- [CHANGED] updated upload_release.yml to build and upload src dist as .tar.gz and .whl
- [CHANGED] updated upload_release.yml to install from PyPI and test the installed package

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- [FIXED] spelling mistake in pyproject.toml

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- [CHANGED] apply FutureWarnings of pandas 2.2
- [CHANGED] increase visibility of collect_all_simbench_codes()
- [CHANGED] setup.py -> pyproject.toml

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- [CHANGED] pandas 2.0 support
- [CHANGED] pandapower 2.12.1 support
- [ADDED] GitHub Actions Workflow (:code:`release.yml`) to automate the SimBench release process

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- [CHANGED] use GitHub-Ci instead of Travis-CI and update CI to python 3.8 and 3.9
- [CHANGED] adapt to pandas changes of version 1.2.0: deprecate set operations for pandas Index
- [CHANGED] generalize (elm, col) recognizing in profiles dicts
- [CHANGED] output type of get_applied_profiles() and get_available_profiles() from list to set
- [ADDED] filter_unapplied_profiles_pp(), get_unused_profiles()