feat: Rule where you can specify a specific field or x-extension that must be included in the openapi

[Jesus-Vallejo-cloudappi]

Feature Request

Describe the Feature Request

I would like to have a rule where i can say something that must be in the openapi file, for example adn x-extension or an option that must to be filled

Describe Preferred Solution

A parameterizable rule where you can say what you want to have

Describe Alternatives

None

Related Code

For example in openapi 3 in definition having a field with an specific name

Additional Context

No

If the feature request is approved, would you be willing to submit a PR?
Yes