[Feat]: Add an option to set temperature point day/night

[michauMiau]

The request

I have a Econet boiler which i use to heat the house. Currently in home assistant you can only set the boiler temperature.
I want to be able to set the panel temperature point for both day and night in home assistant
I have attached some screen shots which you may find useful to know what i'm talking about

Additional information

I'm happy to provide more information or context and i would really like to see this feature in this integration
Also I am not a native English speaker so please excuse any mistakes i made
The controler i have is SControl EM892
The boiler in question is some kind of pellet stove or something that takes wooden pellets and heats the house with them
I hope you understand.
Also i forgot to mention this but seeing the panels temperature would also be useful