[New Port Request] CDT : Constrained Delaunay Triangulation

[Nosenzor]

Library name: CDT : Constrained Delaunay Triangulation

Library description:
CDT is a C++ library for generating constraint or conforming Delaunay triangulations.

open-source: permissively-licensed under Mozilla Public License (MPL) 2.0
cross-platform: tested on Windows, Linux (Ubuntu), and macOS
portable: backwards-compatible with C++98
bloat-free: no external dependencies by default
flexible: can be consumed as a header-only or as a compiled library
performant: continuously profiled, measured, and optimized
numerically robust: triangulation algorithms rely on robust geometric predicates

Source repository URL: https://github.com/artem-ogre/CDT

Project homepage (if different from the source repository): https://artem-ogre.github.io/CDT/

Anything else that is useful to know when adding (such as optional features the library may have that should be included):
License : Mozilla Public License Version 2.0
I suggest to compile it with CDT_USE_64_BIT_INDEX_TYPE and CDT_USE_AS_COMPILED_LIBRARY