Allow uploading custom scribbles

[zisra]

It would be useful to upload your own scribble instead of using the current editor

[Zeke Sikelianos]

Yeah that's a cool idea.

I'll leave this open in case anyone wants to explore adding this capability to Scribble Diffusion, but in the meantime you can also do this directly on Replicate here: https://replicate.com/jagilley/controlnet-scribble -- that model expects a black and white PNG as input. You can run it in the browser or using the Replicate API.

[woutersf]

I have created a version where one can take a picture of a scribble.
See #30
it's not yet finished but someone with React knowledge might have a look at this and then it does what you request here.