feat: SmartButton #55

Job	Run time
build (examples/ACUnit)	1m 56s
build (examples/AirQualitySensor/AirQualitySensor)	2m 5s
build (examples/Blinds)	2m 5s
build (examples/ContactSensor)	1m 47s
build (examples/DimSwitch)	1m 49s
build (examples/doorbell)	1m 50s
build (examples/Fan)	1m 44s
build (examples/GarageDoor)	2m 2s
build (examples/Light/Light)	1m 51s
build (examples/Lock/Lock)	1m 44s
build (examples/Lock/Lock_with_feedback)	2m 5s
build (examples/MotionSensor)	1m 53s
build (examples/PowerSensor)	2m 5s
build (examples/Relay/MultiRelays_advance)	1m 52s
build (examples/Relay/Relay)	1m 49s
build (examples/Speaker)	2m 5s
build (examples/Switch/MultiSwitch_advance)	2m 2s
build (examples/Switch/MultiSwitch_beginner)	1m 49s
build (examples/Switch/MultiSwitch_intermediate)	1m 45s
build (examples/Switch/Switch)	1m 47s
build (examples/Thermostat)	1m 46s
build (examples/TV)	1m 46s
build (examples/Health)	1m 44s
	43m 21s

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