DFT calculation using plane waves basis can be set in this section. The backend called
SIRIUS, computes the basic properties of the system, such as ground state, forces
and stresses tensors which can be used by cp2k afterwards. The engine has all these
features build-in, support of pseudo-potentials and full-potentials, spin-orbit coupling,
collinear and non collinear magnetism, Hubbard correction, all exchange functionals
supported by libxc and Van der Waals corrections (libvdwxc).