Tests

Adding attributes to hold units used by MSContactor #6360

Job	Run time
Check code formatting (Black)	30s
Check Spelling	8s
Compatibility tests	4m 41s
Build Sphinx docs	5m 35s
pytest (py3.8/linux)	18m 48s
Pylint	4m 25s
pytest (py3.8/win64)	34m 24s
pytest (py3.9/linux)	19m 24s
pytest (py3.9/win64)	32m 43s
pytest (py3.10/linux)	17m 38s
pytest (py3.10/win64)	35m 39s
pytest (py3.11/linux)	29m 20s
pytest (py3.11/win64)	48m 28s
pytest (py3.12/linux)	14m 33s
pytest (py3.12/win64)	32m 21s
Upload coverage report (Codecov)	0s
	4h 58m 37s

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