Add more options for schedulers

[redromnon]

Problem

Presently, only a few schedular options are provided including EulerAncestralDiscreteScheduler, EulerDiscreteScheduler, UniPCMultistepScheduler and DDIMScheduler. There are more varieties of schedulers out there that advanced users may prefer to use.

Solution

Add more popular schedulers like DPM++ 2M Karras, DPM++ SDE and Heun.

[Nemo1166]

Hi redromnon,

I am trying to implement something like sd-webui on Colab using diffusers. Your project is impressive, and I've made some tweaks based on your work that seem to enable more sampler support, as well as importing stable-diffusion models mentioned in #1.

I haven't finished all my plans. You can check out here first to get a glimpse.

[redromnon]

Hi @Nemo1166!
Thanks for taking an interest in my project. I just had a quick look at your enhanced notebook and find it very impressive. Please apply the wip label while you still make changes to the PR so it isn't merged by mistake.

Moreover, I don't maintain this project frequently like I used to.
Either you can create your own evolved fork that I can link to or you can join this project as a collaborator instead if you're interested. If I find any time, I can help you add a few more features over time.