Provide a link to the GH source for the current document

[cmeeren]

For more easily getting contributions for fixing typos in the docs, it would be great to have a button/link on each page pointing to the source for that page. (For API reference, this might point to the relevant code file.)

[Krzysztof-Cieslak]

This is not issue with Fornax itself (which is just execution engine) but with the template provided by Waypoint (I guess). I'll transfer the issue to Waypoint repo.