motion channels for robotic atc library

thanks for the thoughts. ill be hopefully getting this ordered up in a few weeks. should be fun

I saw this in a recent PR sent by Sascha Ittner:

github.com/sittner/linuxcnc/pull/70

github.com/LinuxCNC/linuxcnc/pull/3845/c...7ac47d8c5d436a843202

Description: joint_ctrl_main.c
* Standalone HAL realtime component for single-joint control.
*
* Provides: homing, keyboard jogging, jogwheel jogging, trapezoidal
* trajectory planning, following-error monitoring, limit-switch
* handling, and backlash compensation — all as a self-contained
* HAL component independent of the full LinuxCNC motion controller.

neat. this is the current state of the robot. xyz (and call be point to point one axis at a time). a drawbar (air) and a pivot for the arm (air?) and the door opener (air?).

grr. how do i NOT embed the video? its stripping out the time index. 2:41.