Add Gmail Integration

UX Rule: Use AskUserQuestion for ALL interactions with the user. Never just output questions as text — always use the tool so the user gets structured prompts with selectable options.

This skill adds Gmail capabilities to BastionClaw. It can be configured in two modes:

1. Tool Mode - Agent can read/send emails, but only when triggered from WhatsApp
2. Channel Mode - Emails can trigger the agent, schedule tasks, and receive email replies

Initial Questions

AskUserQuestion: How do you want to use Gmail with BastionClaw?

• Tool Mode — Agent can read and send emails when you ask it to. Triggered only from WhatsApp. Simpler setup, no email polling.
• Channel Mode — Everything in Tool Mode, plus emails can trigger the agent, schedule tasks, and receive email replies. Requires email polling infrastructure.

Store their choice and proceed to the appropriate section.