Voxel Plugin

I’ve added a World Generator graph editor:

This graph creates the following world:

The graph system is quite performant (less than 2x slower than C++), so it’s well suited for development.

To improve performance even more, I’ve also added an automatic Graph -> C++ conversion.
For instance, this is the file generated from the graph above: https://pastebin.com/6rQ9dPPC

This means that I now have a Graph Editor that generates optimized C++ code :slight_smile: