GitLab

* add user guide for gpu sampling

* Update minibatch-gpu-sampling.rst
Co-authored-by: Minjie Wang <wmjlyjemaine@gmail.com>

Fix a typo in the tutorial for "Introduction of Neighbor Sampling for GNN Training".
Co-authored-by: Quan (Andy) Gan <coin2028@hotmail.com>

* rename block to mfg

* revert

* rename

Co-authored-by: Jinjing Zhou <VoVAllen@users.noreply.github.com>
Co-authored-by: Minjie Wang <wmjlyjemaine@gmail.com>

* reorg

* change titles

* rm some stale API doc; minor fix

* fix docs

* add warning

* rm new-tutorial run in ci

* lint