feat: add polestar medium SoC widget

[niklasvieth]

Added Medium Homescreen Widget for SoC of Polestar 2.
Documentation: https://github.com/niklasvieth/polestar-ios-medium-widget

[dersvenhesse]

I feel like this doesn‘t need an extra bullet with the lookscreen widget already present. One should suffice.

Or would you rather list this one in favor of the lockscreen widget?

[niklasvieth]

Since both widgets are independent of each other, users might want either or, but if you prefer we can collapse it to one bullet?

[dersvenhesse]

I feel like this medium widget being listed with a link to the lockscreen widget in the short description would be a clean way.