Refine RoboTwin checkpoint description

Replace RoboTwin checkpoint with task-balanced 150k EMA

Update LIBERO unified checkpoint metadata

Delete files checkpoints/libero/object.pth checkpoints/libero/goal.pth checkpoints/libero/spatial.pth checkpoints/libero/long.pth CHECKSUMS.sha256 with huggingface_hub

Replace LIBERO suite checkpoints with unified checkpoint

Update LIBERO checkpoints

Upload TurboVLA LIBERO and RoboTwin checkpoints

initial commit