This is possible in Rhino 6.6.
I understand.
https://www.rhino3d.com/inside
This webpage is a simple markdown file (.md). It’s rendered as an html page on the Rhino website.
This webpage is rendered from a .yaml file which is also a plain text format.
Data in these file formats is simple, but when editing, it can’t be previewed. In my opinion, it’s difficult for the HUGE Rhino Help project.
It’s possible for plug-ins. For example, VisualARQ displays its offline help topics in the Help penal.
I’m sorry. I’m not a programmer. I can’t answer some of your questions.
Thanks,
-Kelvin