DJLevel3

> I didn't supply any ffmpeg, so I believe it was the system one or the included one if that exists. By the way, the build completed, but audio files...

PR in! Turns out I had some stuff totally wrong in how I was fixing it, retried with more accurate fixes and created a PR! There's also a PR out...

Changes pushed to my fork

Bumping this again, I still dislike the current system and think this would be a great change.

This PR also adds support for Blender 4.2+ via a second, identical version of the Blender addon that has the proper blender_manifest.toml alongside the script.

I'll have to redo these changes as they're not compatible with the LuaJIT changes in #259. Closing for now, I'll get back to it once things are finalized with LuaJIT.