Feature Request: Add Chinese UI support for PC and Mobile #767

Hi developers,
I hope OpenBot can add Chinese localization support for both PC and mobile UI.
Many Chinese students and developers are using this project for robotics learning. A Chinese UI will lower the learning barrier for new users.
Expected features:
Add Chinese language resource pack
Support Chinese language switch on PC console
Support Chinese UI on mobile app
Keep English as default, allow switching between languages.
Thanks a lot for your great work!