Equirectangular image

[inuex35]

Equirectangular image rendering support.
See my repo for implementation.
https://github.com/inuex35/360-gaussian-splatting

[pierotofy]

This would be a great addition for sure! Would you be interested in opening a PR?

[inuex35]

Im going to run this with both perspective and equirectangular image set together.
When I confirm it to work, I will open a PR!