[FEATURE] Support AsyncAPI v3.0

[leonid-deriv]

Why do we need this improvement?

To support the latest spec version

How will this change help?

Currently we cannot generate doc for v3

Screenshots

No response

How could it be implemented/designed?

N/A

🚧 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?

No, someone else can work on it.

[github-actions]

Welcome to AsyncAPI. Thanks a lot for reporting your first issue. Please check out our contributors guide and the instructions about a basic recommended setup useful for opening a pull request.
Keep in mind there are also other channels you can use to interact with AsyncAPI community. For more details check out this issue.

[leonid-deriv]

When do you plan to support v3?

[jonaslagoni]

Already supported in html template v2.

[leonid-deriv]

Thank you, should have been more persistent in researching it.