<b>Kotori 4.0.0</b>

- Port code base to kotlin
- Use android ktx location
- Update application logic
- Night theme is darker
- Change app theme from preferences
- Add spanish traslation
- Display current speed in notification instead of max speed
- Add Exit option
- Portrait support
- Change status and navigation bar colors
- Remove Gson dependency
- Update dependencies
- Compile sdk version is 31
- Fix: average speed
