better app icon

composeApp/build.gradle.kts

@@ -101,6 +101,19 @@ compose.desktop {
             targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
             packageName = "net.sergeych.toread"
             packageVersion = "1.0.0"
+
+            macOS {
+                iconFile.set(project.file("src/jvmMain/resources/icons/icon.icns"))
+            }
+            windows {
+                iconFile.set(project.file("src/jvmMain/resources/icons/icon.ico"))
+                shortcut = true
+                menu = true
+            }
+            linux {
+                iconFile.set(project.file("src/jvmMain/resources/icons/icon.png"))
+                shortcut = true
+            }
         }
     }
 }