New surfaces module #521

Job	Run time
oorb-data / Download OpenOrb data for sbpy testing	4s
Python 3.11 with all optional dependencies (MacOS)	1s
tests / Load tox environments	8s
tests / Python 3.11 with all optional dependencies, measuring coverage	1m 8s
tests / Python 3.9 with oldest supported versions, measuring coverage	55s
tests / Python 3.13 with minimal dependencies, measuring coverage	58s
tests / Code style checks	22s
	3m 36s

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