feat(fw_att_control): Add Initial Quat Controller + Debug topic

This commit introduces a new control mode for fixed-wing aircraft that
utilizes Euler angles for attitude control.
Additionally, a new logged topic has been added to facilitate debugging and
monitoring of the Euler rates setpoints during flight.

msg/CMakeLists.txt

@@ -276,6 +276,7 @@ set(msg_files
 	versioned/VehicleLocalPosition.msg
 	versioned/VehicleOdometry.msg
 	versioned/VehicleRatesSetpoint.msg
+	versioned/VehicleEulerRatesSetpoint.msg
 	versioned/VehicleStatus.msg
 	versioned/VtolVehicleStatus.msg
 	versioned/Wind.msg

msg/versioned/VehicleEulerRatesSetpoint.msg

@@ -0,0 +1,5 @@
+uint64 timestamp		# time since system start (microseconds)
+
+float32 roll_rate		# body frame roll rate setpoint (rad/s)
+float32 pitch_rate		# body frame pitch rate setpoint (rad/s)
+float32 yaw_rate		# body frame yaw rate setpoint (rad/s)