feat: icône de fenêtre desktop

desktopApp/src/main/kotlin/com/livrets/desktop/Main.kt

@@ -5,12 +5,14 @@ import androidx.compose.ui.window.Window
 import androidx.compose.ui.window.application
 import androidx.compose.ui.window.rememberWindowState
 import com.livrets.App
+import androidx.compose.ui.res.painterResource
 
 fun main() = application {
     Window(
         onCloseRequest = ::exitApplication,
         title = "Livrets",
         state = rememberWindowState(width = 480.dp, height = 800.dp),
+        icon = painterResource("icons/icon.png"),
     ) {
         App(filesDirPath = storageDir())
     }