Add the following example to Community Examples
🚀 Feature

Motivation
Dear people of Pytorch-Lightning,
Would it be possible for you to add this example on how to integrate torch-points3d with pytorch-lightning under Community Examples ?
Here is framework
https://github.com/nicolas-chaulet/torch-points3d
Best regards,
Thomas Chaton
Here is the example integrating torch-points3d with pytorch-lightning
https://github.com/tchaton/torch-points3d-templates/blob/master/examples/pytorch-lightning/main.py

Pitch

It shows how to train a point cloud classifier with several backbones PointNet2, KPConv, RSConv on ModelNet dataset under 100 lines of code. The integration was really smooth compared to fastAI, I think it is worth noting :)
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Additional context