Fast bed level with BDsensor for klipper

Just let the BDsensor/klipper worked on octopus, there is no z axis up and down so the auto bed leveling can be very fast.

How to install: https://github.com/markniu/Bed_Distance_sensor/wiki/Installing-for-Klipper

BDsensor details: https://github.com/markniu/Bed_Distance_sensor