feat: 🎸 Splash-screen på Android

packages/app/android/app/src/main/res/drawable/splash_background.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="?android:attr/colorBackground" /> 
+    <item>
+        <bitmap android:gravity="center"
+            android:src="@drawable/splash_fg_r"/>
+    </item>
+</layer-list>

packages/app/android/app/src/main/res/values/styles.xml

@@ -1,5 +1,6 @@
 <resources>
     <style name="AppTheme" parent="Theme.AppCompat.DayNight.NoActionBar">
         <item name="android:textColor">#000000</item>
+        <item name="android:windowBackground">@drawable/splash_background</item>
     </style>
 </resources>