[Docs] Add available settings with type, default and descriptions

[hugsy]

Description/Motivation/Screenshots

Fixes issue #943

For now, generated manually, I might add a script later to have them generated automatically during the docs building process.

Against which architecture was this tested ?

N/A

Checklist

• My PR was done against the dev branch, not main.
• My code follows the code style of this project.
• My change includes a change to the documentation, if required.
• If my change adds new code, adequate tests have been added.
• I have read and agree to the CONTRIBUTING document.

[Grazfather]

Looks good, but I think it would be nicer if the Description heading were removed, and the actual description were put outside of the code block