[enhancement]: Any model as refiner? (model switch at)

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Contact Details

_No response_

### What should this feature add?

Add an ability to pick model as a refiner/ switch between two models at certain threshold (see: fooocus)

### Alternatives

- Img2img: too complicated to fiddle with denoise and switching a model manually

### Additional Content

_No response_