Merge branch 'feature/language' into 'develop'

.clang-format

src/algebra/TinyMatrix.hpp

src/algebra/TinyVector.hpp

src/language/PugsParser.cpp

src/main.cpp

src/mesh/CellType.hpp

src/mesh/Connectivity.cpp

src/mesh/Connectivity.hpp

src/mesh/ConnectivityComputer.cpp

src/mesh/ConnectivityComputer.hpp

src/mesh/ConnectivityDispatcher.cpp

src/mesh/ConnectivityDispatcher.hpp

src/mesh/ConnectivityMatrix.hpp

src/mesh/GmshReader.cpp

src/mesh/GmshReader.hpp

src/mesh/IConnectivity.hpp

src/mesh/ItemOfItemType.hpp

src/mesh/ItemToItemMatrix.hpp

src/mesh/ItemType.hpp

src/mesh/ItemValue.hpp