How to implement point clouds render?

Hi, great work! I see that this library is upon [antimatter15/splat](https://github.com/antimatter15/splat), but this library does not have the same render which is very similar to point clouds like that lib. I want to know how to implement this function base on your gsplat library? By the way, do you have any document about the config options, so I can set some render options?