other VQGANS to support

[dmarx]

I'm sure there's a bunch of these floating around that should be simple to add/

• https://huggingface.co/flax-community/vqgan_f16_16384
• https://paperswithcode.com/paper/taming-transformers-for-high-resolution-image
• maybe some were added upstream too? https://github.com/CompVis/taming-transformers