feat: add polestar medium SoC widget (#20)

* feat: add polestar medium SoC widget

* refactor: combine medium & lockscreen polestar widgets

README.md

@@ -41,9 +41,9 @@
 
   <img src="https://github.com/dschablowsky/FordPassWidget/raw/master/fp-widget.jpg" width="400"/>
 
-- [Polestar SoC Lockscreen Widget](https://github.com/niklasvieth/polestar-ios-lockscreen-widget) - Current state of charge of your Polestar 2 as lockscreen widget.
+- [Polestar SoC Medium Widget](https://github.com/niklasvieth/polestar-ios-medium-widget) - Current state of charge of your Polestar 2 as medium widget or as simplified [lockscreen widget](https://github.com/niklasvieth/polestar-ios-lockscreen-widget).
 
-  <img src="https://raw.githubusercontent.com/niklasvieth/polestar-ios-lockscreen-widget/main/images/polestar_lockscreen_widget.jpeg" width="400"/>
+  <img src="https://raw.githubusercontent.com/niklasvieth/polestar-ios-medium-widget/main/images/polestar_medium_widget_relative.jpeg" width="400"/>
 
 - [SmarterTankenWidget.js](https://github.com/Martlgap/SmarterTankenWidget) - Price difference of two gas stations in different countries.