AP_Scripting: add an example to use Copter Standby mode in SITL with LUA #661

Job	Run time
build (stm32f7, chibios, 10)	14m 40s
build (stm32h7, chibios, 10)	13m 5s
build (fmuv2-plane, chibios, 10)	6m 16s
build (periph-build, chibios, 10)	14m 48s
build (iofirmware, chibios, 10)	2m 55s
build (CubeOrange-bootloader, chibios, 10)	1m 30s
build (fmuv3-bootloader, chibios, 10)	1m 13s
build (revo-bootloader, chibios, 10)	1m 10s
build (stm32h7-debug, chibios, 10)	7m 9s
build (fmuv3, chibios, 10)	13m 39s
build (revo-mini, chibios, 10)	10m 43s
build (MatekF405-Wing, chibios, 10)	11m 49s
build (CubeOrange-ODID, chibios, 10)	8m 24s
build (CubeRedPrimary-bootloader, chibios, 10)	1m 17s
build (configure-all, chibios, 10)	10m 10s
build (build-options-defaults-test, chibios, 10)	28m 2s
build (signing, chibios, 10)	10m 7s
build (CubeOrange-PPP, chibios, 10)	7m 4s
build (SOHW, chibios, 10)	13m 10s
build (Pixhawk6X-PPPGW, chibios, 10)	3m 17s
build (new-check, chibios, 10)	14m 10s
	3h 14m 38s

Provide feedback