add 3.2 tags example

[miqui]

This pull request introduces a new example for OpenAPI 3.2.0 demonstrating advanced tag usage in API documentation, specifically for a "Flight API". The changes include both JSON and YAML versions of the example, as well as a corresponding markdown documentation file.

New Flight API example demonstrating advanced tag usage:

Example files:

• Added 3.2-tags-example.json and 3.2-tags-example.yaml files illustrating the use of hierarchical tags (including parent-child relationships), tag kinds (such as nav and badge), and external documentation links for tags in an OpenAPI 3.2.0 specification. [1] [2]

Documentation:

• Added 3.2-tags-example.md to provide documentation and context for the new example, integrating it into the site's example API descriptions.

[baywet]

thanks for putting this together

[miqui]

@ralfhandl if you have a moment....thanks