feat(instrumentation-session-recording): add experimental session recording support

[Blinkuu]

Why

Session recording is a powerful tool for understanding user behavior and debugging issues in web applications. By capturing user interactions, developers can replay sessions to see exactly what users experienced, making it easier to identify and fix bugs, optimize user experience, and understand user flows.

What

Added a new experimental session recording instrumentation package (@grafana/faro-instrumentation-session-recording) that integrates rrweb with the Faro Web SDK. The implementation includes:

• New experimental package under experimental/instrumentation-session-recording/
• Session recording instrumentation that captures DOM mutations, user interactions, and page changes using rrweb
• Comprehensive configuration options including masking, element blocking, and custom selectors for sensitive data protection
• Custom hooks for filtering and transforming events before sending

The feature is designed as an experimental package to allow for testing and feedback before potential inclusion in the main web SDK.

Links

N/A

Checklist

• Tests added
• Changelog updated
• Documentation updated

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