* add bce with logit loss
* add bce with logit loss
* remove imports
* fix tiny bug
* add test documentation and refactor function
* fix test cases and formatting
* add trocr model
* fix formatting
* commit the actual model lol
* more formatting
* remove tokenizer config
* Start adding vision-transformers.
* Add self-attn.
* More vision transformers.
* vit-vit.
* Add the actual vit model.
* Add the example code for the vision transformers.
