Refactoring: uptaded old ground state code to use the new opt_mps struct to return results with metadata
Refactoring: uptaded old ground state code to use the new opt_mps struct to return results with metadata

Former-commit-id: ff376f7d640d084199ed6d747b11250b8baef67e
DavidAce/DMRG,DavidAce/DMRG,DavidAce/DMRG,DavidAce/DMRG