Mesh refactoring: replaced enum with static constexpr

src/TNL/Meshes/Topologies/Hexahedron.h

src/TNL/Meshes/Topologies/IsDynamicTopology.h

src/TNL/Meshes/Topologies/Pyramid.h

src/TNL/Meshes/Topologies/Quadrangle.h

src/TNL/Meshes/Topologies/Tetrahedron.h

src/TNL/Meshes/Topologies/Triangle.h

src/TNL/Meshes/Topologies/Wedge.h

src/TNL/Meshes/TypeResolver/BuildConfigTags.h

src/TNL/Solvers/BuildConfigTags.h

src/TNL/Solvers/FastBuildConfigTag.h

src/Tools/tnl-decompose-grid.cpp

src/Tools/tnl-decompose-mesh.cpp

src/Tools/tnl-diff.cpp

src/Tools/tnl-game-of-life.cpp

src/Tools/tnl-grid-to-mesh.cpp

src/Tools/tnl-init.cpp

src/Tools/tnl-mesh-converter.cpp

src/Tools/tnl-planar-correct-mesh.cpp

src/Tools/tnl-refine-mesh.cpp

src/Tools/tnl-test-distributed-mesh.h