[FEATURE] Generate models for headers

[snailtomatoes]

Why do we need this improvement?

Headers are very important for some applications

How will this change help?

When handling messages having the object for a given schema is invaluable

Screenshots

No response

How could it be implemented/designed?

When payload schemas are selected also check for headers schemas

🚧 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

[github-actions]

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