feat: move `default_icon` to assets

packages/desktop/src/cfg.rs

@@ -88,7 +88,7 @@ impl DesktopConfig {
 
 impl DesktopConfig {
     pub(crate) fn with_default_icon(mut self) -> Self {
-        let bin: &[u8] = include_bytes!("default_icon.bin");
+        let bin: &[u8] = include_bytes!("./assets/default_icon.bin");
         let rgba = Icon::from_rgba(bin.to_owned(), 460, 460).expect("image parse failed");
         self.window.window.window_icon = Some(rgba);
         self