In Editor VR Play Mode

[parameter-pollution]

As mentioned in this canny post (https://feedback.vrchat.com/feature-requests/p/in-editor-vr-play-mode) it would allow very fast iteration on material/audio/... settings while seeing/hearing the results in the VR headset live.

I tried to get it to work myself and I was able to get it to a state where I could press play and see it in my VR headset, but then I couldn't "Build & Test" or "Build & Publish" anymore (build errors).