YuNet face-detection model

UseTool file:
  /vendor/ai/yunet-face-detection-2023mar.onnx

Exact upstream release and file:
  OpenCV Zoo 4.10.0
  https://github.com/opencv/opencv_zoo/blob/4.10.0/models/face_detection_yunet/face_detection_yunet_2023mar.onnx

Upstream license statement:
  The README in that exact directory states that all files in the directory
  are licensed under the MIT License.
  https://github.com/opencv/opencv_zoo/tree/4.10.0/models/face_detection_yunet

Redistributed size:
  232,589 bytes

SHA-256:
  8f2383e4dd3cfbb4553ea8718107fc0423210dc964f9f4280604804ed2552fa4

Changes:
  None. UseTool redistributes the official ONNX file byte-for-byte.

Use:
  The model detects face bounding boxes locally. UseTool then pixelates or
  blurs those regions with Canvas. Photos and detection results are not sent
  to OpenCV or another service.