GitLab

* refactor docs structures

* refactor zh_cn docs

* fix docs

* refactor datasets structures

* minor fix

* refactor en doc dir

* add rst for en

* fix rest

* add chs

* fix lint

* Merge English and Chinese doc into the same folder

* Add logo image back

* Add logo image back

* Create vision_det3d

* Rename vision_det3d to vision_det3d.md

* Update vision_det3d.md

* Refine some details

* Update index.rst

* add seg tutorial

* specify sem seg

* fix typo

* Init with LiDAR-Based 3D Detection Tutorial

* Add supported tasks doc

* Create lidar_det3d.md

* Delete supported_tasks.md

* Create index.rst

* Update lidar_det3d.md