Add workflows: formatting/linting, unit tests, integration tests #1

Job	Run time
integration-tests (3.12, lmdb)	12s
integration-tests-all (3.12)	12s
integration-tests (3.12, postgresql)	9s
integration-tests (3.12, redis)	9s
integration-tests (3.12, iceberg)	9s
integration-tests (3.12, delta_lake)	10s
	1m 1s

Provide feedback