feat: add internal ZCLAW kernel crates to git tracking

crates/zclaw-kernel/src/events.rs

@@ -0,0 +1,34 @@
+//! Event bus for kernel events
+
+use tokio::sync::broadcast;
+use zclaw_types::Event;
+
+/// Event bus for publishing and subscribing to events
+pub struct EventBus {
+    sender: broadcast::Sender<Event>,
+}
+
+impl EventBus {
+    /// Create a new event bus
+    pub fn new() -> Self {
+        let (sender, _) = broadcast::channel(1000);
+        Self { sender }
+    }
+
+    /// Publish an event
+    pub fn publish(&self, event: Event) {
+        // Ignore send errors (no subscribers)
+        let _ = self.sender.send(event);
+    }
+
+    /// Subscribe to events
+    pub fn subscribe(&self) -> broadcast::Receiver<Event> {
+        self.sender.subscribe()
+    }
+}
+
+impl Default for EventBus {
+    fn default() -> Self {
+        Self::new()
+    }
+}