feat(ui): Rename app from MyIce to MyIceK

Update the app display name in all user-visible locations:
Android manifest label, desktop window title, login screen,
and schedule screen top bar.

Refs #2

composeApp/src/androidMain/AndroidManifest.xml

@@ -4,7 +4,7 @@
     <uses-permission android:name="android.permission.INTERNET" />
 
     <application
-        android:label="MyIce"
+        android:label="MyIceK"
         android:icon="@mipmap/ic_launcher"
         android:supportsRtl="true"
         android:enableOnBackInvokedCallback="true"