Add support giot.switch.v51ksm

[darkaccount]

Device: One-Button Switch (Mesh) V5
Model: giot.switch.v51ksm
More Information:
https://home.miot-spec.com/spec/giot.switch.v51ksm

from custom_components.xiaomi_gateway3.core.devices import *

DEVICES = [{
    13138: ["GranwinIoT", "One-Button Switch (Mesh) V5", "giot.switch.v51ksm"],
    "spec": [
        BaseConv("switch", "switch", mi="2.p.1"),
        BaseConv("action", "sensor"),
        ConstConv("action", mi="2.e.1", value=BUTTON_SINGLE),
        MapConv("mode", "select", mi="2.p.2", map={0: "Wired And Wireless", 1: "Wireless", 2: "Smart Switch Mode", 3: "Toggle Switch Mode"}),
        MapConv("power_on_state", "select", mi="2.p.3", map={0: "Off", 1: "On", 2: "Default"}),
        MapConv("led_mode_normal", "select", mi="6.p.1", map={0: "Follow Switch State", 1: "Opposite To Switch State", 2: "Often Out State", 3: "Normally On State"}, entity=ENTITY_CONFIG), 
        BaseConv("backlight", "switch", mi="6.p.3"),
        BoolConv("black_led_valid", "binary_sensor", mi="6.p.4"),
        BaseConv("switch_sensor_on", "switch", mi="11.p.1"),
        MathConv("switch_sensor_mode", "number", mi="11.p.2", min=1, max=7200),
    ],
}] + DEVICES