Connect GitHub wiki page and BeyondPlanck-Commander documentation page

[trygvels]

Title should be descriptive enough. Link them somehow?

[trygvels]

This is the page I am talking about;
https://docs.beyondplanck.science/#/parameters/intro

[maksymbrl]

I have ported BP docs into GitHub pages:
https://cosmoglobe.github.io/Commander/
The sources can be found here:
https://github.com/Cosmoglobe/Commander/tree/devel/docs
With this, I am closing the issue.