[Feature request] JSON output

[simonrw]

Hi, thank you for writing this tool. We have found it very useful.

However we want to integrate our generated CRD documentation into our main documentation pages which are generated by astro. We would like to write our own markdown components to render the docs in a way that matches our style.

Are you interested in accepting a PR that renders JSON output that can be read into other documentation systems like astro? I have a POC available here. If this sounds interesting to you I'm happy to continue working on it and have it accepted in this repository.

Thanks