Add ItemArray interpoler and plug it to the language

src/language/modules/MeshModule.cpp

src/language/utils/CMakeLists.txt

src/language/utils/ItemArrayVariantFunctionInterpoler.cpp

src/language/utils/ItemArrayVariantFunctionInterpoler.hpp

src/language/utils/ItemValueVariantFunctionInterpoler.cpp

tests/CMakeLists.txt

tests/test_ItemArrayVariantFunctionInterpoler.cpp