Draft: Quad and Double arithmetics

Dropped the previous attempt to implement TNL::Arithmetics:: arithmetics expansions. Instead ported and templated the https://github.com/scibuilder/QD.

Still need to be .clang_formated, checked compability with the other modules.

Add to documentation.

Add operators from https://homepages.laas.fr/mmjoldes/campary/.

Compiling with any form of -Ofast (fast math ...) yelds UB by induction (floating point arithmetics).