Add Triangulate_Planar_Contour_Connectivity for bridging offset planar contours#9

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copilot/determine-connectivity-contours

Commits on Jan 31, 2026

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Add Triangulate_Planar_Contour_Connectivity function for triangulating gap between planar contours

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hdclark
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Address code review comments: fix terminology, add comments, and add safety check

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hdclark
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