feat: expose the hijack resources to be able to handle the paused requests

[drake1588]

The changes expose internal resources from the hijacking functionality to better handle paused requests:

• Added Client() method to HijackRouter that returns the underlying proto.Client instance
• Added Event() method to HijackRequest that returns the underlying FetchRequestPaused event

These additions allow external code to access the raw client and event instances, providing more flexibility when handling paused requests in custom implementations.

This allows the consumer to use ContinueResponse command from DevTools or use another request handling operations.

continueResponse := &protorod.FetchContinueResponse{
  RequestID: hijack.Request.Event().RequestID,
}
err = continueResponse.Call(router.Client())
if err != nil {
  return
}

Development guide

Link

Test on local before making the PR

go run ./lib/utils/simple-check