Initial release of 1Password skill.

• Provides guidance for setting up and using the 1Password CLI (op), including installation, desktop app integration, and sign-in.
• Includes workflow steps for verifying setup, multi-account usage, and checking access.
• Offers advice to avoid repeated authentication prompts, especially when using tmux.
• Emphasizes security guardrails: never expose secrets, prefer in-memory operations, and ensure proper authentication steps.