Change a parameter in decode(): deterministic -> train

Fix project_encoder

Fix project_encoder

Add project_encoder and related layers

fix pixel_values being casted to int

fix decoder_position_ids in decode()

fix attention_mask missing

fix FlaxViTGPT2LMModule return value

fix model args

update model script

update model script

Clean Flax ViT + GPT2-LM script

add codes