Generalize the use of MeshConcept

src/language/utils/IntegrateCellArray.hpp

src/language/utils/IntegrateCellValue.hpp

src/language/utils/IntegrateOnCells.hpp

src/language/utils/ItemArrayVariantFunctionInterpoler.cpp

src/language/utils/ItemArrayVariantFunctionInterpoler.hpp

src/language/utils/ItemValueVariantFunctionInterpoler.cpp

src/language/utils/ItemValueVariantFunctionInterpoler.hpp

src/mesh/DiamondDualMeshBuilder.cpp

src/mesh/DiamondDualMeshBuilder.hpp

src/mesh/Dual1DMeshBuilder.cpp

src/mesh/Dual1DMeshBuilder.hpp

src/mesh/MedianDualMeshBuilder.cpp

src/mesh/MedianDualMeshBuilder.hpp

src/mesh/MeshEdgeBoundary.cpp

src/mesh/MeshEdgeBoundary.hpp

src/mesh/MeshEdgeInterface.cpp

src/mesh/MeshEdgeInterface.hpp

src/mesh/MeshFaceBoundary.cpp

src/mesh/MeshFaceBoundary.hpp

src/mesh/MeshFaceInterface.cpp