Hi, I worked on an AMQP 0.9.1 protocol binding using the [RabbitMq.Client](https://www.rabbitmq.com/client-libraries/dotnet-api-guide#overview). I followed the ["RabbitMQ Protocol Binding for CloudEvents" specification](https://github.com/knative-extensions/eventing-rabbitmq/blob/main/cloudevents-protocol-spec/spec.md) and looked (of course) at how the [AMQP 1.0 bindings](https://github.com/cloudevents/sdk-csharp/tree/main/src/CloudNative.CloudEvents.Amqp) here do things. I would like to create a PR to get this integrated into the sdk-csharp.