Add dcli status

[robertoash]

I use some python scripts in order to be able to autofill my passwords in qutebrowser. In order to do that I need to, for example, check if dcli is logged in and unlocked before attempting to retrieve a password.

Since there is no dcli status command then I have act based on the output of dcli sync or reissue dcli password in a terminal if not logged in. However, that means that I double my calls to the api endpoints and I am hitting rate limits since that is not the intended use of those commands.

Could a dcli status command be added with just some basic output like:

~> dcli status
Logged in: yes
Locked: no