Migrate to resilient MQTT for cheerlights

[andypiper]

Use https://github.com/peterhinch/micropython-mqtt/tree/master/mqtt_as in place of umqtt.robust

[ozett]

may add some basic receiving commands via mqtt like in tasmota?

https://tasmota.github.io/docs/MQTT/#commands-over-mqtt

[andypiper]

interesting idea here, thanks!