Splash screen

[eldcn]

Splash screen

:recycle: Current situation & Problem

• Fixes #63 by adding support for showing a splash screen with app icon while - Is further customizable via SplashScreen API, such as simple animations.
• Currently we were always launching onboarding screen, and once user info got loading we were performing a navigation
• Instead, we now use a splash screen and loading state, and calculate the initial start destination, and only then show the app content based on the user state
• Some small other adjustments done, such as splitting AppScreen logic from main activity view model to a new view model.

:gear: Release Notes

Add a bullet point list summary of the feature and possible migration guides if this is a breaking change so this section can be added to the release notes. Include code snippets that provide examples of the feature implemented or links to the documentation if it appends or changes the public interface.

:books: Documentation

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:white_check_mark: Testing

Please ensure that the PR meets the testing requirements set by CodeCov and that new functionality is appropriately tested. This section describes important information about the tests and why some elements might not be testable.

:pencil: Code of Conduct & Contributing Guidelines

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 88.31169% with 9 lines in your changes missing coverage. Please review.

Project coverage is 44.68%. Comparing base (d2701ef) to head (1ded361).

Additional details and impacted files

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