Add jsbsim bridge to enable jsbsim for px4 SITL on jsbsim (#15748)

* Add jsbsim bridge to enable jsbsim for px4 SITL/HIL on jsbsim

This is a PX4 HIL/SITL integration into JSBSim. JSBSim is an open source flight dynamics model (http://jsbsim.sourceforge.net/)

Currently there are three models available which is the rascal, quadrotor_x, hexarotor_x integrated into the bridge.

The simulation can be run with the firmware with the following command for example
```
make px4_sitl jsbsim_rascal
```

The visualization is done flightgear and is done by the bridge sending UDP packets to flightgear. To disable the visualization `HEADLESS=1` when running the make command.

The simulation can be configured through the configuration files under the `config` directory through a xml file. Senor configurations,  The xml file name should match the name of the model.

* Update Tools/sitl_run.sh

Co-authored-by: Beat Küng <beat-kueng@gmx.net>

Co-authored-by: Beat Küng <beat-kueng@gmx.net>

ROMFS/px4fmu_common/init.d-posix/10017_quadrotor_x

@@ -0,0 +1,12 @@
+#!/bin/sh
+#
+# @name Quadrotor SITL model for JSBSim
+#
+# @type Quadrotor Wide
+#
+# @maintainer Jaeyoung Lim <jaeyoung@auterion.com>
+#
+
+sh /etc/init.d/rc.mc_defaults
+
+set MIXER quad_w

ROMFS/px4fmu_common/init.d-posix/10018_hexarotor_x

@@ -0,0 +1,35 @@
+#!/bin/sh
+#
+# @name Hexacopter SITL model for JSBSim
+#
+# @type Hexarotor x
+#
+# @maintainer Jaeyoung Lim <jaeyoung@auterion.com>
+#
+
+sh /etc/init.d/rc.mc_defaults
+
+if [ $AUTOCNF = yes ]
+then
+	param set MC_PITCHRATE_P 0.1
+	param set MC_PITCHRATE_I 0.05
+	param set MC_PITCH_P 6.0
+	param set MC_ROLLRATE_P 0.15
+	param set MC_ROLLRATE_I 0.1
+	param set MC_ROLL_P 6.0
+	param set MPC_XY_VEL_I_ACC 4
+	param set MPC_XY_VEL_P_ACC 3
+
+	param set RTL_DESCEND_ALT 10
+	param set RTL_LAND_DELAY 0
+
+	param set TRIG_INTERFACE 3
+	param set TRIG_MODE 4
+	param set MNT_MODE_IN 4
+	param set MNT_DO_STAB 2
+	param set MAV_PROTO_VER 2
+fi
+
+set MAV_TYPE 13
+
+set MIXER hexa_x