Add support to Lumina-Image 2.0

[zhuole1025]

Model/Pipeline/Scheduler description

Lumina-Image 2.0 is the latest model in the Lumina family and will be released very soon (https://huggingface.co/Alpha-VLLM/Lumina-Image-2.0). It is a 2-B parameter Diffusion Transformer that significantly improves instruction-following and generates higher-quality, more diverse images. Our paper will be released soon, and we have finished the diffuser pipeline for Lumina-Image 2.0.

Open source status

• The model implementation is available.
• The model weights are available (Only relevant if addition is not a scheduler).

Provide useful links for the implementation

No response

[a-r-r-o-w]

@zhuole1025 This looks great! As you mention that the diffusers adaptation is complete, I wonder if you, or someone from your team, would like to open a PR adding support for it. We can then iterate together on finishing docs/tests and other things required for integration

[nitinmukesh]

@zhuole1025
Please if possible add bf16 variants in the repo.