Initial support for idle notify and idle ihibit

src/wayland/handlers/idle_notify.rs

@@ -0,0 +1,12 @@
+use smithay::{delegate_idle_notify, wayland::idle_notify::IdleNotifierHandler};
+
+use crate::state::State;
+
+impl IdleNotifierHandler for State {
+    fn idle_notifier_state(
+        &mut self,
+    ) -> &mut smithay::wayland::idle_notify::IdleNotifierState<Self> {
+        &mut self.common.idle_notifier_state
+    }
+}
+delegate_idle_notify!(State);