Draft: Simplify the game template doc around a custom launcher
Related to: example-suite!29
Requires a separate commit in the example suite repo to add a working openmw.cfg file there.
Specific assumptions:
- the correct data= and content= paths are added to that openmw.cfg file
- we don't need the paths to essential models anymore as they will be in the example suite settings.cfg file and we're not making users copy this file anywhere
Edited by Armand Golpaygani