Bug: Improve the auth approval by determing exact criteria of the skill to get teh verification code from my sms properly (agent wasn't able to do this)

[KalebCole]

AC:

• done when the agent can deterministcally

[KalebCole]

Fixed by PR #38 🎉

PR #38 replaced the bookmarklet-based auth flow with a fully automated phone-based approach:

• Uses sendAuthCodeTrusted API → getLoginToken → signInWithCustomToken for clean phone auth
• Auto-retrieves SMS verification codes from iMessage via imsg CLI on macOS — zero manual steps
• Supports --code flag for manual entry and Termux SMS retrieval on Android
• Usage: partiful auth login +12066993977

No more copy-pasting codes from your phone.