Use one standard Iris resource bundle

examples/minimal.rs

@@ -10,11 +10,7 @@ struct State {
 }
 
 impl DesktopAppState for State {
-    fn new(
-        mut ui_state: DesktopUiState,
-        rsc: &mut DesktopRsc<Self>,
-        _: Proxy<Self::Event>,
-    ) -> Self {
+    fn new(mut ui_state: DesktopUiState, rsc: &mut StdRsc<Self>, _: Proxy<Self::Event>) -> Self {
         rect(PaintId::RED).set_root(rsc, &mut ui_state);
         Self { ui_state }
     }