Explain how to setup Sentry in combination with trace bundle

[frankdekker]

Solves: #40

Update readme about combining Sentry with the trace bundle.

[Copilot]

Pull Request Overview

This PR updates the README documentation to provide clear instructions on integrating Sentry with the trace bundle. The update explains how to properly configure both systems to use consistent trace and transaction IDs.

• Adds detailed configuration example showing how to disable Sentry's built-in tracing
• Explains the relationship between Sentry's native trace IDs and the bundle's trace IDs
• Provides specific configuration code for both Sentry and the trace bundle

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