Add fuel tank status report support

* Adds support to DroneCAN FuelTankStatus messages
* Adds fuel_tank_status uORB message
* Adds FUEL_STATUS MAVLink stream
* Adds parameter to define max fuel tank capacity

src/drivers/uavcan/uavcan_params.c

@@ -97,6 +97,20 @@ PARAM_DEFINE_FLOAT(UAVCAN_RNG_MIN, 0.3f);
  */
 PARAM_DEFINE_FLOAT(UAVCAN_RNG_MAX, 200.0f);
 
+/**
+ * UAVCAN fuel tank maximum capacity
+ *
+ * This parameter defines the maximum fuel capacity of the vehicle's fuel tank.
+ *
+ * @min 0.0
+ * @max 100000.0
+ * @unit liters
+ * @decimal 1
+ * @increment 0.1
+ * @group UAVCAN
+ */
+PARAM_DEFINE_FLOAT(UAVCAN_ECU_MAXF, 15.0f);
+
 /**
  * UAVCAN ANTI_COLLISION light operating mode
  *
@@ -292,6 +306,17 @@ PARAM_DEFINE_INT32(UAVCAN_SUB_DPRES, 0);
  */
 PARAM_DEFINE_INT32(UAVCAN_SUB_FLOW, 0);
 
+/**
+ * subscription fuel tank
+ *
+ * Enable UAVCAN fuel tank status subscription.
+ *
+ * @boolean
+ * @reboot_required true
+ * @group UAVCAN
+ */
+PARAM_DEFINE_INT32(UAVCAN_SUB_FUEL, 0);
+
 /**
  * subscription GPS
  *