Review/refactor tesselator

[tpaviot]

Rafctor Tesselator to use more modern c++

Summary by Sourcery

Refactor the ShapeTesselator implementation to modernize its C++ usage and improve safety, maintainability, and performance.

Enhancements:

• Replace raw arrays and manual memory management with std::vector and std::unique_ptr for faces, edges, and consolidated mesh data
• Decompose tessellation logic into focused helper methods (e.g., ProcessFaces, ProcessNormals, ProcessTriangles, ComputeEdges)
• Use STL algorithms (e.g., std::accumulate, std::move_iterator) and reserve/move semantics to optimize memory allocation and data consolidation
• Introduce RAII and noexcept/const correctness across public interface and replace manual delete operations
• Modernize export routines and stream formatting using std::ostringstream and range-based operations

Build:

• Bump C++ standard requirement from C++11 to C++14 in CMakeLists.txt

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