Add BrowserHand implementation with:
- BrowserAction enum for all automation actions
- Navigate, Click, Type, Scrape, Screenshot, FillForm
- Wait, Execute (JavaScript), GetSource, GetUrl, GetTitle
- Scroll, Back, Forward, Refresh, Hover, PressKey, Upload
- Hand trait implementation with config and execute
- Integration with existing Tauri browser commands
Browser Hand enables agents to interact with web pages
for navigation, form filling, scraping, and automation.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
