Add B0->D0pp, D0->hh line (and WS version): shifters PLEASE ignore

Small commit to add lines for B0->D0(hh)p+ p~- decays and those with same sign protons.

Another B2OC Sprucing line - link to the DPA task https://gitlab.cern.ch/lhcb-dpa/project/-/issues/78 on the ensemble of Sprucing lines.