vehicles: add new vehicle type: Airship (#14862)

Co-authored-by: Anton Erasmus <anton@flycloudline.com>
Co-authored-by: Beat Küng <beat-kueng@gmx.net>

ROMFS/px4fmu_common/init.d/airframes/2507_cloudship

@@ -0,0 +1,21 @@
+#!/bin/sh
+#
+# @name Cloudship
+# @type Airship
+# @class Airship
+#
+# @output MAIN1 starboard thruster
+# @output MAIN2 port thruster
+# @output MAIN3 thrust tilt
+# @output MAIN4 tail thruster
+
+sh /etc/init.d/rc.airship_defaults
+
+if [ $AUTOCNF = yes ]
+then
+	param set COM_PREARM_MODE 2
+	param set CBRK_IO_SAFETY 22027
+fi
+
+set MIXER cloudship
+set PWM_OUT 1234