[fix] wrong slice in visualize_motion

[add] safety notice

[add] deploy repository link

[add] sim2real demo

[add] motion retargeting support

fix typo in cfg

fix mjcf missing mass and inertial

Update README.md

fix quat_conjugate func call bug

fix typo in walk_cfg

fix sim2sim time sync

Update README.md

Add files via upload

Update readme

Init commit