Implement Stable Diffusion & Clipdrop API

Implement Stable Diffusion API as well as Clipdrop API with negative prompt fields, multi-prompt fields so we can use features like:

-TEXT TO IMAGE

-IMAGE TO TEXT

-IMAGE TO IMAGE

-STABLE DIFFUSION XL

-UNCROP

-REIMAGINE XL

-STABLE DOODLE

-CLEANUP

-REMOVE BACKGROUND

-RELIGHT

-IMAGE UPSCALER

-REPLACE BACKGROUND

-TEXT REMOVER

-SKY REPLACER