Support Chroma Radiance

[gitmylo]

Feature Idea

Chroma radiance is an in-development diffusion model (with a few releases so far) which runs in pixel space rather than latent space.
To make chroma radiance work with swarmui, a new model type should be added for it, and most of the behavior should be the same as regular chroma, with 2 changes:

1. The vae should select "pixel_space", which is a new option for pixel space models, not an actual model so no downloads required
2. Instead of EmptySD3LatentImage, use EmptyChromaRadianceLatentImage for creating the "latent", or rather empty image
   After those changes are made, the model should work without issues

Model: https://huggingface.co/lodestones/Chroma1-Radiance
Comfyui supports it: comfyanonymous/ComfyUI#9682

Other

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