Fix cv2.imwrite on non-ASCII paths (#7139)

* Fix imwrite on non-ASCII paths

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update general.py

* Update __init__.py

* Update __init__.py

* Update datasets.py

* Update hubconf.py

* Update detect.py

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update general.py

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

hubconf.py

@@ -127,10 +127,11 @@ if __name__ == '__main__':
     # Verify inference
     from pathlib import Path
 
-    import cv2
     import numpy as np
     from PIL import Image
 
+    from utils.general import cv2
+
     imgs = ['data/images/zidane.jpg',  # filename
             Path('data/images/zidane.jpg'),  # Path
             'https://ultralytics.com/images/zidane.jpg',  # URI