Link browser demo and document the int8 ONNX export

Add int8-quantised ONNX export for in-browser inference

Document benchmark checkpoints in model card

Add FER2013 benchmark checkpoints (mirrored from Google Drive)

Upload README.md with huggingface_hub

Upload face_detection_yunet_2023mar.onnx with huggingface_hub

Upload Z_resmasking_dropout1_rot30_2019Nov30_13.32 with huggingface_hub

Upload README.md with huggingface_hub

initial commit