Add BiRefNet

[shauray8]

Model/Pipeline/Scheduler description

Bilateral Reference for High-Resolution Dichotomous Image Segmentation https://arxiv.org/pdf/2401.03407

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

https://github.com/ZhengPeng7/BiRefNet