refactor: integrate Koin for dependency injection across platforms

androidApp/src/main/AndroidManifest.xml

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

androidApp/src/main/kotlin/fr/ajaury/gwenedeg/GwenedegApp.kt

@@ -0,0 +1,5 @@
+package fr.ajaury.gwenedeg
+
+import android.app.Application
+
+class GwenedegApp : Application()