Calculator Plus

Hi Everyone, time for new release.

-New UI 😎🔥
-Full Kotlin rewrite & migrate all functionalities
-Update app target to API 30 (Android R)
-Removed extra themes
-Add support for light/dark theme based on device settings
-Add button haptic feedback, if enabled by device
-Add Firebase crashlytics to detect app crashes
-Fixed Application hangs when given a long expression
-Fixed Operator after decimal