cli: warn in `display` if account is deactivated

[2501babe]

noticed while working on get_available_balances() we dont check if a StakeStateV2::Stake is deactivated, we just treat its delegation as canonical. this is generally correct as pool stakes shouldnt be deactivated, so we dont need to go to stake history or anything. but we should warn if a pool has been deactivate-delinquented. do at the same time as #118 since this is all related to onramp-related display