chore(consensus): add documentation to consensus crate #8228

Job	Run time
integration-test	18m 59s
executable-run	11m 31s
executable-run-no-rpc	11m 21s
build-papyrus-utilities-image	32s
random-table-test	2m 49s
test-no-rpc	7m 20s
	52m 32s

Provide feedback