Implementation of Issue #291: Decouple Browser Session Tracking from backgroundTools

[bhouston]

Implementation of Issue #291: Decouple Browser Session Tracking from backgroundTools

Changes Made

1. Created a new BrowserTracker class in packages/agent/src/tools/browser/browserTracker.ts that is responsible for tracking browser sessions
2. Moved browser-specific tracking logic from backgroundTools.ts to this new class
3. Implemented a new listBrowsers tool that uses the dedicated BrowserTracker
4. Updated browseStart.ts and browseMessage.ts to use the new tracker instead of backgroundTools
5. Removed browser-related code from backgroundTools.ts

Implementation Details

• The new BrowserTracker works alongside the existing browserSessions map to provide status tracking
• It provides methods for registering, updating, and retrieving browser sessions
• The listBrowsers tool has similar filtering capabilities as listBackgroundTools but focused only on browser sessions
• The implementation maintains backward compatibility

Testing

The changes need to be tested to ensure:

• Browser sessions can be created and tracked correctly
• The listBrowsers tool works as expected
• The browseStart and browseMessage tools work with the new tracker
• The backgroundTools class no longer tracks browser sessions
• All tests pass

Related Issues

Resolves #291

[bhouston]

This is completed.