Support decision transformers

[emilx-cell]

Model description

Hi,
I would love to see decision transformers added to the list of supported models:
https://huggingface.co/docs/transformers/model_doc/decision_transformer
Thank you,
EM.

Prerequisites

• The model is supported in Transformers (i.e., listed here)
• The model can be exported to ONNX with Optimum (i.e., listed here)

Additional information

An example decision model:
https://huggingface.co/edbeeching/decision_transformer_atari

Your contribution

I apologize, but this is beyond my coding skills.

[xenova]

Here we go: #795. + list of converted models: https://huggingface.co/models?library=transformers.js&other=decision_transformer&sort=trending

I will add example Transformers.js code now too. I'll also look at the model you linked.

[emilx-cell]

Thank you, looks great! amazing package.