chore(consensus): add documentation to consensus crate #8275

Job	Run time
executable-run-no-rpc	11m 9s
executable-run	13m 1s
integration-test	18m 31s
test-no-rpc	6m 39s
build-papyrus-utilities-image	21s
random-table-test	2m 31s
	52m 12s

Provide feedback