* unified scaffold background color
* unified components elevation
* use filled tonal icon buttons
* aligned slider colors with guidelines
* removed unused `CloseButton`
* migrated to outlined icons
* moved timer list tile to the top of the section
* updated goldens
* migrated to the latest material utils
* reaplced `SchemeTonalSpot` with `SchemeRainbow`
* fixed ruler slider ticks color
* update goldens
* fixed tests
* fixed scheme mapping and returned to `SchemeTonalSpot`
- Fixed test coverage calculation
- Removed `mockito` from the application mock
- Implemented platform channel mocks to mimic incident light metering
- Covered providers with unit tests
- Covered metering screen pickers with widget tests
- Laid foundation for integration tests
