Is anyone working on a Discourse Wiki?

DiscoTOC is a theme component not a plugin. It is installed following How do I install a Theme or Theme Component? and it is definetly available for you, give it a try.

Oh I see.

I think trying to get a working instance for prolog, even if powered by SWI-Prolog compiled to WASM may be your best bet. Try contacting the founder @Amjad_Masad .