texture: change parametrization in CUDA texturing from XAtlas to best view clustering - #1270
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… views clustering
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Replaced the CUDA texturing UV parametrization with a custom in-house method and removed the old xatlas path entirely.
The new parametrization builds texture charts by grouping mesh faces into connected components that share the same best source view, then assigns UVs by directly projecting each chart into that camera. Faces without a valid view fall back to a simple local planar triangle parametrization. This keeps the parametrization step lightweight and predictable, reuses information already computed by the CUDA texturing pipeline, and avoids the overhead of running a separate global UV unwrapping stage.