FW add mavlink NAV_CONTROLLER_OUTPUT

msg/fw_pos_ctrl_status.msg

@@ -1,5 +1,14 @@
 uint64 timestamp		# timestamp this topic was emitted
+
+float32 nav_roll
+float32 nav_pitch
+float32 nav_bearing
+
+float32 target_bearing
+float32 wp_dist
+float32 xtrack_error
 float32 turn_distance		# the optimal distance to a waypoint to switch to the next
+
 float32 landing_horizontal_slope_displacement
 float32 landing_slope_angle_rad
 float32 landing_flare_length