feat(01-04): add Android MainApplication + manifest registration

- Create MainApplication : Application() running configureLogging() then initKoin { androidContext(this@MainApplication) } in onCreate
- Register android:name=".MainApplication" on <application> element (MainActivity entry preserved)
- Establishes the canonical init order for Android process boot

composeApp/src/androidMain/AndroidManifest.xml

@@ -2,6 +2,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
 
     <application
+            android:name=".MainApplication"
             android:allowBackup="true"
             android:icon="@mipmap/ic_launcher"
             android:label="@string/app_name"

composeApp/src/androidMain/kotlin/dev/ulfrx/recipe/MainApplication.kt

@@ -0,0 +1,16 @@
+package dev.ulfrx.recipe
+
+import android.app.Application
+import dev.ulfrx.recipe.di.initKoin
+import dev.ulfrx.recipe.logging.configureLogging
+import org.koin.android.ext.koin.androidContext
+
+class MainApplication : Application() {
+    override fun onCreate() {
+        super.onCreate()
+        configureLogging()
+        initKoin {
+            androidContext(this@MainApplication)
+        }
+    }
+}