Clean the searchbar after closing.

Implement application search bar.
Move the top app bar to the separate file.
Move the composable character list to the separate file.

Add the api and repository classes.
Add dependency injection.
Create new packages and move some classes to them.
Implement characters list loading.

Organize functions into separate packages.
Add screens description (Screen.kt) and the navigation logic.

Update the app theme.
Implement character list screen on a presentation level.
Add app logo and navigation icons.

Update kotlin compiler extension version.
Remove unnecessary dependencies from dependency list.
Structure dependency list.

Remove viewModels, fragments, layouts and related classes.
Add the android jetpack compose support.