docs: uORB messages doc standard tweaks

msg/versioned/FixedWingLongitudinalSetpoint.msg

@@ -1,14 +1,15 @@
 # Fixed Wing Longitudinal Setpoint message
+#
 # Used by the fw_lateral_longitudinal_control module
 # If pitch_direct and throttle_direct are not both finite, then the controller relies on altitude/height_rate and equivalent_airspeed to control vertical motion.
 # If both altitude and height_rate are NAN, the controller maintains the current altitude.
 
 uint32 MESSAGE_VERSION = 0
 
-uint64 timestamp                        # time since system start (microseconds)
+uint64 timestamp # [us] Time since system start
 
-float32 altitude  			# [m] Altitude setpoint AMSL, not controlled directly if NAN or if height_rate is finite
-float32 height_rate 			# [m/s] [ENU] Scalar height rate setpoint. NAN if not controlled directly
-float32 equivalent_airspeed 		# [m/s] [@range 0, inf] Scalar equivalent airspeed setpoint. NAN if system default should be used
-float32 pitch_direct 			# [rad] [@range -pi, pi] [FRD] NAN if not controlled, overrides total energy controller
-float32 throttle_direct 		# [norm] [@range 0,1] NAN if not controlled, overrides total energy controller
+float32 altitude # [m] Altitude setpoint AMSL, not controlled directly if NAN or if height_rate is finite
+float32 height_rate # [m/s] [@frame ENU] Scalar height rate setpoint. NAN if not controlled directly
+float32 equivalent_airspeed # [m/s] [@range 0, inf] Scalar equivalent airspeed setpoint. NAN if system default should be used
+float32 pitch_direct # [rad] [@range -pi, pi] [@frame FRD] NAN if not controlled, overrides total energy controller
+float32 throttle_direct # [norm] [@range 0,1] NAN if not controlled, overrides total energy controller