[Feature] Extract Gaussian when possible.

[iiiCpu]

Trellis (and, maybe, others) do a better generation of 3D object than one expects.

Input:

Gaussian output preview:

https://github.com/user-attachments/assets/b9e11ade-5db8-4471-9334-a013202ad96c

There is transparency, actual glass, which is not converted with common algorithm.

GLB output preview:

We should implement Gaussian output as well as better mesh converters.

[MrForExample]

@iiiCpu Yeah, my friend, there are indeed so many things we could be to improve this project, unfortunately as for now there is almost just me and my free time in this project, I do have plan to get more help within next few months though, I can pay/train one or two engineers help me handle this project, so I can best use my time to R&D state of the art 3D/Texture Gen AI