AEM Components - Markdown Documentation
The Granite UI widget fieldDescription property is used to add helpful tooltips to your dialog fields but in some cases, you might need to add details documentation about the component, whether it’s technical or for Authoring instructions.
Then you may use dialogs helpPath property to link component document to the dialog, the path could be github page or confluence page or any other page. For instance core components uses adobe documents as help document for the component, example Core Image component
Wondering if the this documentation can be part of AEM or dialog itself.
Ahmed Musallam has created a blog about reading readme file and generating document when click on help link. You should check this out at https://blogs.perficient.com/2019/03/27/simple-markdown-documentation-for-your-aem-components/