* feat: layer diffuse
* fix: commit layerdiffuse custom node correctly
* wip: new mm
* fix: compat. version of `horde_model_reference`
* fix: use compat. version of `horde_sdk`
* fix: latest horde_sdk in `pre-commit` mypy deps
* load layerdiffuse models from model manager
* ld working
* fix: ensure diffusers version for layered diffusion node

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Co-authored-by: tazlin <tazlin.on.github@gmail.com>