microbit vision webapp step 6: automatically aim and shoot


https://ferryzhou.github.io/nezha-ble/hands-ble/index.htm
https://github.com/ferryzhou/nezha-ble/tree/main/hands-ble
https://makecode.microbit.org/S41681-69957-52890-33070
tuned the middle range from [40, 60] to [45, 55]
also added function of shoot, based on son's lego shooting component design, using a servo to trigger
tested and it works!
the next step is to change hands tracking to object detection.