Add interface for depth in both forward rendering and backward propagation#5

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ingra14m wants to merge 4 commits intographdeco-inria:mainfrom

Commits on Aug 27, 2023

Add depth forward pass
ingra14m
committed

Commits on Aug 29, 2023

Add backward pass
ingra14m
committed

Commits on Sep 22, 2023

Merge pull request #2 from graphdeco-inria/main
ingra14m
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Commits on Sep 29, 2023

Fix bugs of depth backward pass
ingra14m
committed