Add WebSocket Monitoring Support to GoVisual

[louk-io]

Changes

• Implemented WebSocket monitoring capabilities in GoVisual
• Updated README with WebSocket monitoring features and example usage
• Added new WebSocket-specific documentation and quick start guide
• Extended project description to highlight WebSocket support

Tests

• Verified WebSocket handshake tracking
• Confirmed message logging for WebSocket connections
• Tested WebSocket connection lifecycle monitoring
• Ensured compatibility with Gorilla WebSocket library

Documentation

• Expanded README with comprehensive WebSocket integration example
• Added WebSocket-specific configuration options
• Updated feature list to include WebSocket monitoring capabilities

Follow-up Recommendations

• Create more detailed WebSocket monitoring documentation
• Develop additional WebSocket example scenarios
• Consider adding WebSocket connection analytics
• Implement more granular WebSocket message filtering options

Testing Instructions:

1. Run the provided WebSocket example in the README
2. Check dashboard at http://localhost:8080/__viz
3. Verify WebSocket connections, messages, and handshakes are correctly displayed

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