Meggie-sourceanalysis

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- nothing changed yet

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- Add first test
- Migrate to pyproject.toml

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- Remove unnecessary mayavi and pysurfer dependencies from setup.py
- Add metadata to configuration.json-files to get tooltips.
- Add codestyle-checks.
- Refactor coregistration action.

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- Make mne 1.0-compatible.

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- Add missing mayavi and pysurfer dependencies to setup.py

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- Add to pypi
- Fix dependency to Meggie>=1.3.0