docs(tutorial): Bitcoin Logic - Triggering Contracts via Chainhooks

[jadonamite]

Description

This PR adds Module 30: Bitcoin Logic by @jadonamite. It details the architecture for automating Stacks contract execution based on Bitcoin OP_RETURN events using Chainhooks.

Content Overview

• The Gap: Addressing the passive nature of smart contracts.
• The Listener: Configuring Chainhook YAML to scan for OP_RETURN patterns.
• The Relay: A Node.js pattern for receiving webhooks and broadcasting Stacks transactions.

Checklist

• Chainhook YAML syntax validated against latest Hiro docs.
• Security considerations for the Relayer pattern discussed.
• Formatting follows the repository's style guide.

Related Issues

Closes # (If applicable)