How to configure kafka for eventmesh-store?

### Search before asking

- [X] I had searched in the [issues](https://github.com/apache/eventmesh/issues?q=is%3Aissue) and found no similar issues.

### Question

i could not find any document for using kafka as an eventmesh-store. The offiicial document only have rocketmq

Start by finding the existing RocketMQ eventmesh-store documentation mentioned in the issue and the corresponding Kafka configuration entry point in the repository. Document Kafka setup in the same place, including the information needed to use eventmesh-store, and confirm the instructions work.

Written by the indexing model from the issue text.