move uidev dashboard to dash-frontend crate

uidev/src/testbed/testbed_dashboard.rs

@@ -0,0 +1,25 @@
+use crate::testbed::Testbed;
+use wgui::{event::EventListenerCollection, layout::Layout};
+
+pub struct TestbedDashboard {
+    frontend: dash_frontend::Frontend,
+}
+
+impl TestbedDashboard {
+    pub fn new(listeners: &mut EventListenerCollection<(), ()>) -> anyhow::Result<Self> {
+        Ok(Self {
+            frontend: dash_frontend::Frontend::new(dash_frontend::FrontendParams { listeners })?,
+        })
+    }
+}
+
+impl Testbed for TestbedDashboard {
+    fn update(&mut self, width: f32, height: f32, timestep_alpha: f32) -> anyhow::Result<()> {
+        self.frontend.update(width, height, timestep_alpha)?;
+        Ok(())
+    }
+
+    fn layout(&mut self) -> &mut Layout {
+        self.frontend.get_layout()
+    }
+}