[feature request] add Adetailer to Stable diffusion extension

[itsbumpin]

Adetailer detects faces and various body parts after a render and can do a focused pass over them using custom prompts.

It's especially useful in creating consistent renders of the same character when combined with loras. It would be a great addition to silly tavern's image generation.

Here's a link to the API:
https://github.com/Bing-su/adetailer/wiki/API