v1.7.0 — guided init wizard + auth-error teaching

Added

• vmware-storage init — interactive first-run setup wizard. Prompts for host /
  username / password and writes config.yaml + .env for you. The password is
  stored grep-safe (b64:, never plaintext on disk) and .env is locked to
  0600, then the connection is verified. Replaces the manual "mkdir + cp
  config.example.yaml + edit YAML + chmod 600" dance.

Changed

• doctor now points to vmware-storage init when config/credentials are missing
  (previously suggested a command that did not exist), keeping the manual steps
  as a fallback.
• Authentication and TLS failures now print a teaching message naming the exact
  file and env var to fix (~/.vmware-storage/.env password var, config.yaml
  username) plus a verify_ssl: false hint for self-signed labs.