[Doc] Documentation Needed for eventmesh-connector-kafka

[VishalMCF]

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• I had searched in the issues and found no similar issues.

Documentation Related

Currently, most connectors lack documentation. The following details must be added to provide better clarity to the developers:- 1. functions of the current connector
2. descriptions of configuration items
3. precautions (if any),
4. relevant official reference links (if any),
5. Other specific content that needs to be explained in the documentation.
Having these details can increase the clarity for the users who are using the product and can also help in onboarding the new developers easily

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct *

[github-actions]

Welcome to the Apache EventMesh community!!
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[pandaapo]

In the future, community will mainly maintain documents in eventmesh-site. Therefore, if it is convenient for you, please write the new English documents in this directory of eventmesh-site, and Chinese documents in the directory.

[Ish1yu]

its closed by apache/eventmesh-site#204