Lagrange Release v6.12.0

Infrastructure

• Improve CMake target folder setting coverage.
• Improve C++20 MSVC compatibility.

Core

• Fixed sub-mesh extraction for 2D meshes.
• Replace chain_edges and chain_edges_into_simple_loops with chain_directed_edges and chain_undirected_edges.
• Added SurfaceMesh support for topology computation, including compute_euler, is_vertex_manifold, is_edge_manifold, is_manifold.
• Added SurfaceMesh support for extract_boundary_loops.

IO Module

• Added support for saving 2D meshes in .msh format.

Python

• Minor fix for SurfaceMesh.get_edge_vertices.