Add support for Mathjax

[navin1976]

Is your feature request related to a problem? Please describe.
In order to describe mathematical problems (especially in reserach posts and specifications), the wiki needs support for math notation.

Describe the solution you'd like
Mathjax

Describe alternatives you've considered
Briefly described in the linked issue from Docusaurus

Additional context
There has been previous discussion about this topic at Docusaurus with a few solutions assessed and a working solution seemingly identified:
facebook/docusaurus#2078

[Dr-Electron]

Basically done with 0223413