Something similar, yes. However I suspect that they created that site using Markdown and a static site generator. [Edit - yup - Hugo]
I'm not sure how "static" this site is. I say that because of the links on the right side. Particularly the one that indicates you can edit the page, This seems more "wiki" like.
LOL, not me. I've been a non-conformist dweeb that walks to the rhythm of his own percussion instrument all my life! 😉
Me neither, but they're very hot in developer documentation right now, according to the Write the Docs community.
@Jigyasa, assuming you have RH2019 New, try creating a Frameless output using the Dark skin.
If you're completely new to Robohelp, there's a free tutorial available, although I haven't viewed it yet: https://courses.techcommtools.com/p/rh2019intro
@Jeff and @Captiv8tr I've had a go at one of the static site generators. It's cool, but you need to be super technical. :S