v3.1.0

• Add scriptable, non-interactive TOTP code retrieval: passlane list -o --code prints the current codes (with valid_for_seconds in --json) and passlane show -o --once prints a single matching code to stdout for use in scripts
• Add a Claude agent skill (.claude/skills/passlane) that teaches an AI agent how to use passlane in automations, such as programmatically logging into websites and APIs