msgs: Clean up message definitions and descriptions

- Add versioning to interfacing messages
- Add header description
- Add units, frame and range wherever possible
- Add [norm] and @range indentifiers

msg/versioned/LongitudinalControlConfiguration.msg

@@ -0,0 +1,17 @@
+# Fixed Wing Longitudinal Control Configuration message
+# Used by the fw_lateral_longitudinal_control module and TECS to constrain FixedWingLongitudinalSetpoint messages
+# and configure the resultant setpoints.
+
+uint32 MESSAGE_VERSION = 0
+
+uint64 timestamp                        # time since system start (microseconds)
+
+float32 pitch_min   			# [rad][@range -pi, pi] defaults to FW_P_LIM_MIN if NAN.
+float32 pitch_max   			# [rad][@range -pi, pi] defaults to FW_P_LIM_MAX if NAN.
+float32 throttle_min 			# [norm] [@range 0,1] deaults to FW_THR_MIN if NAN.
+float32 throttle_max 			# [norm] [@range 0,1] defaults to FW_THR_MAX if NAN.
+float32 climb_rate_target 		# [m/s] target climbrate to change altitude. Defaults to FW_T_CLIMB_MAX if NAN. Not used if height_rate is directly set in FixedWingLongitudinalSetpoint.
+float32 sink_rate_target 		# [m/s] target sinkrate to change altitude. Defaults to FW_T_SINK_MAX if NAN. Not used if height_rate is directly set in FixedWingLongitudinalSetpoint.
+float32 speed_weight 			# [@range 0,2], 0=pitch controls altitude only, 2=pitch controls airspeed only
+bool enforce_low_height_condition 	# [boolean] if true, the altitude controller is configured with an alternative timeconstant for tighter altitude tracking
+bool disable_underspeed_protection 	# [boolean] if true, underspeed handling is disabled in the altitude controller