Merge branch 'feature/mesh-variant' into 'develop'

src/dev/ParallelChecker.hpp

src/language/modules/MeshModule.cpp

src/language/modules/MeshModule.hpp

src/language/modules/SchemeModule.cpp

src/language/modules/WriterModule.cpp

src/language/utils/EmbeddedDiscreteFunctionMathFunctions.cpp

src/language/utils/EmbeddedDiscreteFunctionOperators.cpp

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/CMakeLists.txt

src/mesh/CartesianMeshBuilder.cpp

src/mesh/DiamondDualMeshBuilder.cpp

src/mesh/DiamondDualMeshBuilder.hpp

src/mesh/Dual1DMeshBuilder.cpp

src/mesh/Dual1DMeshBuilder.hpp