Add new columns to Predbat Plan screen (outside temp and load_forecast)

[zarch1972]

Is your feature request related to a problem? Please describe. As someone who is playing with Predheat for my heat pump it would be great to see a couple of extra columns on the plan screen.

Describe the solution you'd like Add forecasted Outside Temperature and load_forecast kWh columns So we can see the effect the outside temp has on the extra load required for heating.

Describe alternatives you've considered none, other than trying to put sensors on my Home Assistant home screen.

Additional context Add any other context or screenshots about the feature request here.

Thanks, Mick