CI: Run Tests on MacOS

Add DNP3 structs (without objects nor groups) #6

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Run time

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Job	Run time
Python 3.11 on MacOS	1m 4s
Python 3.13 on MacOS	58s
Python 3.10 on MacOS	1m 16s
Python 3.12 on MacOS	1m 6s
	4m 24s