Make scheme compatible with 2d and 3d problems

src/language/modules/CMakeLists.txt

src/language/modules/SchemeModule.cpp

src/scheme/CMakeLists.txt

src/scheme/EulerKineticSolver2D.hpp

src/scheme/EulerKineticSolverMultiD.cpp

src/scheme/EulerKineticSolverMultiD.hpp