Lyft is due to be the first giant tech start-up to list its shares on the stock market this year — and it has laid out all the roadblocks that could derail not only its own business, but the ridesharing industry itself.From dockless scooters and bicycles to self-driving cars, any number of transport modes Lyft has bet on could upend the ride-hailing business that it helped pioneer, according to documents Lyft filed as part of its initial public offering process.