Add canny detector, midas detector

[jinwonkim93]

Hi i was trying your tutorial https://huggingface.co/blog/controlnet. But this feature stop me for testing other models.

This is a copy of https://github.com/lllyasviel/ControlNet/tree/main/annotator with few modification to support PIL.Image.

All credit goes to https://github.com/lllyasviel .

[patrickvonplaten]

Cool!