Refactor sa2's settingshelper so that the slot/card configs can be shared with PreferencesViewController

[sh95014]

Describe the bug

settingshelper.cpp:

  const std::map<size_t, std::vector<SS_CARDTYPE>> cardsForSlots =
    {
      {0, {CT_Empty, CT_LanguageCard, CT_Saturn128K}},
      {1, {CT_Empty, CT_GenericPrinter, CT_Uthernet2}},
      {2, {CT_Empty, CT_SSC, CT_Uthernet2}},
      {3, {CT_Empty, CT_Uthernet, CT_Uthernet2, CT_VidHD}},
      {4, {CT_Empty, CT_MockingboardC, CT_MegaAudio, CT_SDMusic, CT_MouseInterface, CT_Phasor, CT_Uthernet2}},
      {5, {CT_Empty, CT_MockingboardC, CT_MegaAudio, CT_SDMusic, CT_Disk2, CT_GenericHDD, CT_Phasor, CT_Uthernet2, CT_Z80, CT_SAM, CT_FourPlay, CT_SNESMAX}},
      {6, {CT_Empty, CT_Disk2, CT_Uthernet2}},
      {7, {CT_Empty, CT_GenericHDD, CT_Uthernet2}},
    };

    const std::vector<SS_CARDTYPE> expansionCards =
      {CT_Empty, CT_LanguageCard, CT_Extended80Col, CT_Saturn128K, CT_RamWorksIII};

PreferencesViewController.mm:

const SS_CARDTYPE slot0Types[] = { CT_LanguageCard, CT_Saturn128K, CT_Empty };
const SS_CARDTYPE slot1Types[] = { CT_GenericPrinter, CT_Uthernet2, CT_Empty };
const SS_CARDTYPE slot2Types[] = { CT_SSC, CT_Uthernet2, CT_Empty };
const SS_CARDTYPE slot3Types[] = { CT_Uthernet, CT_Uthernet2, CT_VidHD, CT_Empty };
const SS_CARDTYPE slot4Types[] = { CT_MockingboardC, CT_MegaAudio, CT_SDMusic, CT_MouseInterface, CT_Phasor, CT_Uthernet2, CT_Empty };
const SS_CARDTYPE slot5Types[] = { CT_MockingboardC, CT_MegaAudio, CT_SDMusic, CT_Z80, CT_SAM, CT_Disk2, CT_Phasor, CT_FourPlay, CT_SNESMAX, CT_Uthernet2, CT_Empty };
const SS_CARDTYPE slot6Types[] = { CT_Disk2, CT_Uthernet2, CT_Empty };
const SS_CARDTYPE slot7Types[] = { CT_GenericHDD, CT_Uthernet2, CT_Empty };
const SS_CARDTYPE *slotTypes[] = {
    slot0Types, slot1Types, slot2Types, slot3Types, slot4Types, slot5Types,
    slot6Types, slot7Types,
};

const SS_CARDTYPE expansionSlotTypes[] = { CT_LanguageCard, CT_Extended80Col, CT_Saturn128K, CT_RamWorksIII, CT_Empty };