GNN Implementation

RegMs If e601c41345 feat: add GAT method 3 lat temu
cora a369eeda23 initial commit 3 lat temu
gnn.go e601c41345 feat: add GAT method 3 lat temu
go.mod a369eeda23 initial commit 3 lat temu
graph.go 0c20b14336 feat: add parallelism 3 lat temu
main.go 0e85412ab0 feat: add random walk sampling 3 lat temu
matrix.go 0e85412ab0 feat: add random walk sampling 3 lat temu
test.out e601c41345 feat: add GAT method 3 lat temu
vector.go e601c41345 feat: add GAT method 3 lat temu