Add SD-WebUI-NSFW-Filter

[aria1th]

Info

https://github.com/aria1th/sd-webui-nsfw-filter
Blur the generated images based on NSFWJS model, converted to onnx format by DeepGHS
NOTE : Preview images are not blurred, the saved result and result views are blurred.

Checklist:

• I have read the Readme.md
• The description is written in English.
• The index.json and extension_template.json have not been modified.
• The entry is placed in the extensions directory with the .json file extension.

[w-e-w]

coincidentally I've been working on an nsfw for work filter myself at the moment
my should be ready to release in a couple days
the main difference being that I'm using NudeNet which allows me to only blur out certain regions of the bodies
I got the idea from #200

I also made my work even for live preview
if you want I should be able to make live preview work for you extension