* fixed import error

I had an
ImportError: cannot import name 'Protocol' from 'typing'
while trying to update so I fixed it to start an app

* Update main.py

* deleted example files

It needs the CLIPVision model so I added CLIPVisionLoader and CLIPVisionEncode.

Put the clip vision model in models/clip_vision
Put the t2i style model in models/style_models

StyleModelLoader to load it, StyleModelApply to apply it
ConditioningAppend to append the conditioning it outputs to a positive one.

Specify which way is the recommended way to run ComfyUI in colab.

from the CLIPLoader node.

Use a more simple way to detect if the model is -v prediction.

--use-pytorch-cross-attention to use it.