Added :feature:splash module, migrated SplashScreenFragment to it

app/build.gradle.kts

app/src/main/AndroidManifest.xml

app/src/main/java/io/xxlabs/messenger/MessengerApp.kt

.../java/io/xxlabs/messenger/main/ui/SplashScreenFragment.kt

app/src/main/java/io/xxlabs/messenger/ui/MainActivity.kt

app/src/main/java/io/xxlabs/messenger/ui/WindowManager.kt

app/src/main/res/layout/activity_main.xml

app/src/main/res/navigation/nav_graph.xml

app/src/main/res/values/strings.xml

...ain/java/io/elixxir/core/preferences/PreferencesConfig.kt

.../java/io/elixxir/core/preferences/di/PreferencesModule.kt

...src/main/java/io/elixxir/core/ui/util/ContextExtension.kt

feature/splash/.gitignore

feature/splash/build.gradle.kts

feature/splash/consumer-rules.pro

feature/splash/proguard-rules.pro

...java/io/elixxir/feature/splash/ExampleInstrumentedTest.kt

feature/splash/src/main/AndroidManifest.xml

...src/main/java/io/elixxir/feature/splash/model/AppState.kt

...rc/main/java/io/elixxir/feature/splash/model/UserState.kt