[QTextStream] char16_t / char32_t support for QTextStream

    QTextStream out(stdout);
    using namespace Qt::Literals;

    out << "const char*: ";
    out << "yada";
    out << "\nconst char16_t*: ";
    out << u"yada";
    out << "\nconst char* (utf-8): ";
    out << u8"yada";
    out << "\nconst char32_t*: ";
    out << U"yada";
    out << "\nQString: ";
    out << u"yada"_s;
    out << "\n";

const char*: yada
const char16_t*: 0x6392ed7ef0de
const char* (utf-8): yada
const char32_t*: 0x6392ed7ef0e8
QString: yada

    qDebug() << "const char*: " << "yada";
    qDebug() << "const char16_t*: " << u"yada";
    qDebug() << "const char* (utf-8): " << u8"yada";
    qDebug() << "const char32_t*: " << U"yada";
    qDebug() << "QString: " << u"yada"_s;
    qDebug() << "\n";

const char*:  yada
const char16_t*:  yada
const char* (utf-8):  yada
const char32_t*:  0x5564a8b401e8
QString:  "yada"