Support request for LifeControl MCLH-03

[bastshoes]

I would like to ask for support of LifeControl MCLH-03 - smart plug.
Actually it working for switching. But it also supports metering. Screen shots of clusters below:

[bastshoes]

Could you provide general guide line how to add sensors with power consumption for plug? I'll try to do it myself.

[gonczarov]

make support please

[bastshoes]

Support added via PR #1726