* OPM demos should have their own folder
Five OPM demos now, at this point they should have their own folder.
* Delete demos/misc/the_king_of_crisp_opm.fur
* Delete demos/misc/vortex_opm.fur
* Delete demos/misc/waterworld_map_opm.fur
* Delete demos/misc/lagrange_point_2023_opm.fur
* Delete demos/misc/hope_for_the_dream_opm.fur
* Update powernoise.md
I believe this clarification is necessary in case people initially get confused about where the AM exactly is outputted to.
