confluent kafka protocol binding

[yanmxa]

Given the popularity of this repos: https://github.com/confluentinc/confluent-kafka-go, Are we also considering integrating it?

We now have the implementation of sarama, but there are still many people who are optimistic about the stability of confluent. Also the confluent provides a high-level consumer, which is more convenient for asynchronous message confirmation(commit partition/offset) than sarma.

Of course, both clients have their own advantages, just considering that there are still many people who like confluent. If you consider adding the confluent protocol, I can bring its implementation.

refers: https://github.com/cloudevents/sdk-go/issues/846, https://github.com/cloudevents/sdk-go/issues/298, https://github.com/cloudevents/sdk-go/pull/183