feat(image): add FireRed Image Edit 1.1 support

[Minamiyama]

No description provided.

[gemini-code-assist]

Code Review

This pull request adds support for the "FireRed-Image-Edit-1.1" model by defining its specification and updating the stable diffusion core to load it via the DiffusionPipeline. It also updates the image_to_image method to apply default generation configurations and combine reference_images for QwenImageEditPlusPipeline. Feedback suggests addressing potential runtime errors: safely handling cases where self._model_spec is None to avoid an AttributeError, and ensuring reference_images is wrapped in a list if it is not already iterable to prevent a TypeError.

[gemini-code-assist]

The self._model_spec attribute is defined as Optional and can be None. Accessing self._model_spec.default_generate_config directly without a None check can lead to an AttributeError if the model is initialized without a spec. We should safely handle the case where self._model_spec is None.

        default_config = (
            self._model_spec.default_generate_config
            if self._model_spec is not None
            else None
        ) or {}
        generate_kwargs = default_config.copy()
        generate_kwargs.update({k: v for k, v in kwargs.items() if v is not None})
        kwargs = generate_kwargs