Method to_string

src/Core/include/OpenLoco/Core/BitSet.hpp:388–398

        template<class TChar = char, class TTraits = std::char_traits<TChar>, class TAlloc = std::allocator<TChar>>
        std::basic_string<TChar, TTraits, TAlloc> to_string(TChar zero = TChar{ '0' }, TChar one = TChar{ '1' }) const
        {
            std::basic_string<TChar, TTraits, TAlloc> res;
            res.resize(TBitSize);
            for (size_t i = 0; i < TBitSize; ++i)
            {
                // Printed as little-endian.
                res[TBitSize - i - 1] = get(i) ? one : zero;
            }
            return res;
        }

        constexpr BitSet operator^(const BitSet& other) const noexcept
        {