What is a cli-wallet and where can I find it?

There's a cli_wallet functionality that lets you derive key pairs from the Master Password. It's used for convenience, as you need to securely store one, instead all four.
To derive Owner Key from Master Password, bob would need to use:
get_private_key_from_password bob owner P5Hzer2h4R4Lkkjr455T4msnJyjwwmrjLLDYNATMAukM2yehVE6R