Xiaomi CyberDog's first release.
Move the repositories to GitHub and replace the athena keyword with cyberdog in batches.
Add grpc_vendor, lcm_vendor, mpg123_vendor, sdl2main_vendor, sdl2mixer_vendor and opencv_vendor to constrain the building environment.
- Remove opencv_vendor, combine sdl2main_vendor & sdl2mixer_vendor into sdl2_vendor. Remove vision pkgs.
- Add behaviortreecppv3_vendor
- Optimize audio pkgs