Run Iris examples on desktop and Android

examples/task/android.rs

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+use iris::prelude::*;
+
+#[path = "lib.rs"]
+mod app;
+use app::*;
+
+#[derive(AndroidUiState)]
+struct State {
+    ui_state: AndroidUiState,
+}
+
+impl AndroidAppState for State {
+    type Resources = StdRsc<Self>;
+}
+
+#[iris::app_init]
+fn create(mut ui_state: AndroidUiState, rsc: &mut StdRsc<State>) -> State {
+    build(rsc, &mut ui_state);
+    State { ui_state }
+}

examples/task/desktop.rs

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+use iris::prelude::*;
+
+#[path = "lib.rs"]
+mod app;
+use app::*;
+
+#[derive(DesktopUiState)]
+struct State {
+    ui_state: DesktopUiState,
+}
+
+impl DesktopAppState for State {
+    fn new(mut ui_state: DesktopUiState, rsc: &mut StdRsc<Self>, _: Proxy<Self::Event>) -> Self {
+        build(rsc, &mut ui_state);
+        Self { ui_state }
+    }
+}
+
+fn main() {
+    DesktopApp::<State>::run();
+}

examples/task/lib.rs

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+use iris::prelude::*;
+use std::time::Duration;
+
+pub(crate) fn build<Rsc: HasEvents + HasTasks>(rsc: &mut Rsc, ui_state: &mut impl HasRoot<Rsc>)
+where
+    Rsc::State: FocusHost,
+{
+    let rect = rect(PaintId::RED).add(rsc);
+    rect.task_on(CursorSense::click(), async move |mut ctx| {
+        iris::task::sleep(Duration::from_secs(1)).await;
+        ctx.update(move |_, rsc| {
+            let rect = rect(rsc);
+            if rect.is_paint(&PaintId::RED) {
+                rect.set_paint(PaintId::BLUE);
+            } else {
+                rect.set_paint(PaintId::RED);
+            }
+        });
+    })
+    .set_root(rsc, ui_state);
+}