Add Latent Split node (2/4 spatial split) for ComfyUI

Splits a [B,C,H,W] latent into left/right or top/bottom halves, or four
quadrants. Model-agnostic (SD, SDXL, Flux / FLUX.1 Krea); preserves batch
dimension and noise_mask.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

__init__.py

@@ -0,0 +1,3 @@
+from .nodes import NODE_CLASS_MAPPINGS, NODE_DISPLAY_NAME_MAPPINGS
+
+__all__ = ["NODE_CLASS_MAPPINGS", "NODE_DISPLAY_NAME_MAPPINGS"]