Why do we need this improvement?

Currently, the Avro Schema is not validated with the CLI.

How will this change help?

This change will help to write valid Avro Schemas in AsyncAPI.

Screenshots

No response

How could it be implemented/designed?

1. Extract the Avro schemas (can also be helpful as a separate command)
2. Parse the Avro schema.
3. Show errors and warnings if any come up.

🚧 Breaking changes

No

👀 Have you checked for similar open issues?

• I checked and didn't find a similar issue

🏢 Have you read the Contributing Guidelines?

• I have read the Contributing Guidelines

Are you willing to work on this issue?

None