* setup golden toolkit
* implemented `GoldenTestApplicationMock`
* added devices with dark theme
* implemented MeteringScreen golden test
* moved platform channel logic to app mock
* implemented SettingsScreen golden test
* gitignore golden tests failures
* Create dart_test.yaml
* adjusted `RulerSlider` ticks height
* set master screenshots
* run golden tests on ci
* fixed `LightSensorService` tests
* removed golden workflow call from PR check
* Update pr_check.yml
