Add alternative entity for Second sun

[BebeMischa]

Is your feature request related to a problem? Please describe.
I'm using two weather forecast cards, one for home and second for a second house for holidays, which is in different timezone. I'm using Sun2 integration for the sunrise/down times. ( https://github.com/pnbruckner/ha-sun2 )
I would love to see those times in this weather card, being able to choose alternative entities for sun.
As it is now, the weather for both locations shows the same sunrise/down times, which is incorrect.

Describe the solution you'd like
Please make it possible to choose alternative entities for sun

Additional context
Feel free to ask for details ;-) Thank you in advance...