[Models][330][transformer]cait

[Ash-Lee233]

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Is your feature request related to a problem? Please describe.
https://arxiv.org/abs/2103.17239
https://github.com/rwightman/pytorch-image-models/blob/main/timm/models/cait.py

Describe the solution you'd like
model.py
readme
config