Add Workflow and CBMAWorkflow classes. Support pairwise CBMA workflows #880

Job	Run time
Determine if CI should be skipped	4s
Unit tests with minimum dependency versions (ubuntu-latest, 3.8)	52m 7s
Corrector performance tests (ubuntu-latest, 3.8)	54m 41s
Estimator performance tests (ubuntu-latest, 3.8)	12m 41s
Unit tests (ubuntu-latest, 3.8)	50m 7s
Unit tests (ubuntu-latest, 3.9)	45m 28s
Unit tests (ubuntu-latest, 3.10)	50m 9s
Unit tests (ubuntu-latest, 3.11)	56m 37s
Unit tests (macos-latest, 3.8)	1h 19m 0s
Unit tests (macos-latest, 3.9)	1h 12m 36s
Unit tests (macos-latest, 3.10)	1h 9m 18s
Unit tests (macos-latest, 3.11)	1h 19m 12s
Smoke performance tests (ubuntu-latest, 3.8)	38m 18s
Upload coverage	13s
	11h 0m 31s

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