feat: Added ImageReward, Clip and Blip scorers, fixed download of aesthetic scorers and gave the option to average scorers

[WhiteWipe]

WIP

[WhiteWipe]

New Scorers Currently Added with Links:
ImageReward: https://github.com/THUDM/ImageReward
BlipScore: Implementation from IR repository
ClipScore: Implementation from IR repository
Pick-A-Pic: https://github.com/yuvalkirstain/PickScore
HPSv2: https://github.com/tgxs002/HPSv2
The classifier used to filter the dataset for waifu-diffusion: https://huggingface.co/hakurei/waifu-diffusion-v1-4/tree/main/models
Cafe_Aesthetic: https://huggingface.co/cafeai/cafe_aesthetic
Shadow_Aesthetic: https://huggingface.co/shadowlilac/aesthetic-shadow

[Koitenshin]

If you want to add a really good super strict image scorer, check out this HF repo. Just make sure you grab the pull request from the bot under the Community tab. It has the safetensors file you'll want. It has two options, 'good' is super strict while 'normal' rates everything pretty highly.

I've tested almost every single image scorer there is, and there's only a couple good ones. You really don't want an image scorer that's going to rate something highly if the image is actually bad.

#wkpark/sd-webui-model-mixer#148