[Feature Request] Add support for Apache RocketMQ Protocol Binding

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Currently, the Go SDK does not support the Apache RocketMQ protocol. Users working with RocketMQ cannot natively send/receive CloudEvents using this SDK.

I would like to contribute the RocketMQ protocol implementation to sdk-go.

We now have the necessary prerequisites to move forward with this:

• Specification: The RocketMQ binding spec is already listed in the CloudEvents Proprietary Specs.
• Reference Implementation: The Java SDK has already implemented this protocol (see cloudevents/sdk-java#554).

I plan to implement this binding by referencing the Java SDK's logic and adhering to the spec.

• Dependency: I will use the official Go client: github.com/apache/rocketmq-client-go/v2.
• Structure: It will follow the pattern of existing protocols (like Kafka/Sarama or NATS).

I have experience with RocketMQ and would like to start working on this.
Does this sound good to the maintainers?