Proper depth occlusion for multi-splats scenes

[jo-chemla]

First of all, thanks for this great library and docs! Two quick questions:

• Could you implement better z-depth based occlusion for multiple splats in the same scene? Might not be the simplest feature since the whole renderer/rasterizer projects transparent ellipsoids onto the camera plane. But since the color rendering is so good, blending ellipsoids z-depth with the same transparency blending could lead to a pretty correct z-depth for the splat - which would therefore lead to correct depth-fighting for multi-splats scenes, which is atm pretty terrible.
• Will the LumaSplatsWebGL/LumaSplatsThree libraries themselves be open-sourced at some point?