feat: integrate browser-use for web automation

[khaliqgant]

Add browser agent capability that allows any relay agent to request
web automation tasks via the browser-use Python library.

Components:

• BrowserWrapper: TypeScript wrapper that bridges Python browser-use
  with the relay protocol
• browser_agent.py: Python bridge that receives relay messages and
  executes browser automation tasks
• CLI command: agent-relay browser to start a browser agent
• Setup script and requirements for easy installation

Usage:

Start browser agent

agent-relay browser

Send task from any agent

TO: Browser

Navigate to https://example.com and extract all links

Requires: Python 3.11+, browser-use, langchain-openai/langchain-anthropic

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📊 7 files reviewed • 3 high risk • 7 need attention

🚨 High Risk:

• src/browser/browser-wrapper.ts — Crucial for security and functionality.
• src/browser/python/browser_agent.py — Central to browser automation; critical to assess and secure.

⚠️ Needs Attention:

• src/browser/browser-wrapper.ts — Contains important logic that requires careful attention to prevent crashes and security vulnerabilities.
• src/cli/index.ts — Modifications could impact usability; require careful assessment.
• +1 more concerns...

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