Function utf8_to_utf16

modules/core/core/include/OpenString/unicode.h:187–190

		}

		[[nodiscard]] constexpr std::array<char16_t, utf16::SEQUENCE_MAXIMUM_LENGTH> utf8_to_utf16(ochar8_t const* const utf8, const u64 length) noexcept
		{
			return utf32_to_utf16(utf8_to_utf32(utf8, length));
		}
		
		[[nodiscard]] constexpr std::array<ochar8_t, UTF8_SEQUENCE_MAXIMUM_LENGTH> utf16_to_utf8(char16_t const* const utf16, const u64 length) noexcept
		{