New surfaces module #499

Job	Run time
oorb-data / Download OpenOrb data for sbpy testing	4s
Python 3.11 with all optional dependencies (MacOS)	1m 21s
tests / Load tox environments	7s
tests / Python 3.13 with minimal dependencies, measuring coverage	43s
tests / Python 3.11 with all optional dependencies, measuring coverage	53s
tests / Code style checks	29s
tests / Python 3.9 with oldest supported versions	48s
	4m 25s

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