Add new Complementarity formualtion for VLE with cubic EoSs #6636

Job	Run time
Check Spelling	6s
Check code formatting (Black)	33s
Compatibility tests	4m 29s
Pylint	4m 51s
pytest (py3.8/linux)	18m 47s
Build Sphinx docs	5m 39s
pytest (py3.8/win64)	34m 10s
pytest (py3.9/linux)	18m 32s
pytest (py3.9/win64)	30m 25s
pytest (py3.10/linux)	16m 51s
pytest (py3.10/win64)	34m 35s
pytest (py3.11/linux)	24m 23s
pytest (py3.11/win64)	45m 46s
pytest (py3.12/linux)	14m 29s
pytest (py3.12/win64)	28m 19s
Upload coverage report (Codecov) (linux)	10s
Upload coverage report (Codecov) (win64)	11s
	4h 42m 16s

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