Add ResGConv and res_gconv_norm #10553
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As part of the CS224W project, @BlakeMasters and I added ResGConv and res_gconv_norm used in Chen (2025), Graph Neural Preconditioners for Iterative Solutions of Sparse Linear Systems. It's a PyG implementation of the GCNConv layer in @jiechenjiechen's PyTorch implementation of the Graph Neural Preconditioners paper called GNP.
We started from the GCN2Conv layer and gcn_norm and tried to follow these implementations.
We hope the layer and/or normalization can be useful for others in the future.
Thank you very much in advance.