Support live updates via MQTT

[bourquep]

Discussed in #50

^{Originally posted by CaptainSteubing November 25, 2024}
Howdy,

Thanks for developing this skin for Weewx. It's nice and light and works well on mobile devices.
May I make a suggestion to have it connect to the server via MQTT for instant updates? The WDC & Belchertown skins seem to have this feature.

Thanks!