feat: add send_named_int function and Lua binding #35562

Job	Run time
build (chibios, Durandal)	22m 40s
build (chibios, MatekF405)	18m 50s
build (chibios, KakuteF7)	17m 55s
build (chibios, MatekH743-bdshot)	21m 58s
build (chibios, Pixhawk1-1M)	9m 5s
build (chibios, MatekF405-CAN)	1m 32s
build (chibios, DrotekP3Pro)	2m 19s
build (chibios, Hitec-Airspeed)	2m 28s
build (chibios, f103-GPS)	3m 22s
build (disco, armhf)	6m 8s
	1h 46m 17s

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