check if vault is unlocked when running ssh-manager

[MylesBolton]

Is your feature request related to a problem? Please describe.
maybe could bee a good idea to check if the user has BW unlocked when running ssh-manager

Describe the solution you'd like
trow a error to inform the user that the vault is locked instead of saying everything is fine

Additional context
#107 (comment)

[alchemicalkube]

BW cli has a status command that reports in JSON with this info:

{
  "serverUrl": null,
  "lastSync": "2025-04-22T12:22:48.931Z",
  "userEmail": "email@gmail.com",
  "userId": "5798f9fb-b8bc-49ed-8863-1e8d6e1a6acc",
  "status": "locked"
}

So it's possible to unmarshal this and process it.

I haven't checked ssh-managers code yet so not sure if this sort of thing already exists.