GitLab

* add bruteforce impl

* add nn descent implementation

* change doc-string

* remove redundant func

* use local rng for cuda

* fix lint

* fix lint

* fix bug

* fix bug

* wrap nndescent_knn_graph into knn

* fix lint

* change function names

* add comment for dist funcs

* let the compiler do the unrolling

* use better blocksize setting

* remove redundant line

* check the return of the cub calls
Co-authored-by: Tong He <hetong007@gmail.com>