Mage-Flow

### Model/Pipeline/Scheduler description

Series of image generation models

Note: official implementation is hardcoded to CUDA and flash-attn 2 and may not be easy to port

### Open source status

- [x] The model implementation is available.
- [x] The model weights are available (Only relevant if addition is not a scheduler).

### Provide useful links for the implementation

https://github.com/microsoft/Mage/tree/main/mage_flow

https://huggingface.co/microsoft/Mage-Flow
https://huggingface.co/microsoft/Mage-Flow-Base
https://huggingface.co/microsoft/Mage-Flow-Turbo
https://huggingface.co/microsoft/Mage-Flow-Edit
https://huggingface.co/microsoft/Mage-Flow-Edit-Base
https://huggingface.co/microsoft/Mage-Flow-Edit-Turbo

Start by reading the upstream implementation in microsoft/Mage’s mage_flow directory and compare it with the linked Hugging Face Mage-Flow checkpoints. Determine the scope needed to add Mage-Flow support to diffusers, including the listed model variants, and verify that the result works despite the upstream CUDA and flash-attn 2 assumptions.

Written by the indexing model from the issue text.