Getter function that gets the x position of the drone. (x is forwards and backwards)
get_pos_x(unit="<cm, in, mm, m>)
unit: The unit of measurement that is chosen for the position distance. Available units are "m" (meter), "cm" (centimeter), "mm" (millimeter), or "in" (inch). If a parameter is not specified cm is chosen by default.
The current x position of the drone.