[Pretrain Weight] X-Decoder training pretrained weight release

We are releasing the pretrain model weight for x-decoder training, including unicl pretrained focalt and focall models.

Add caption class similarity

Add caption class similarity for coco

[Training + Checkpoint] Training Code and Large Checkpoint Release

We are exited to release the Training code and Focal-Large checkpoint of X-Decoder : )

X-GPT checkpoints

Checkpoints for X-GPT