fix(networkmanager): support late module initialisation

For example when a second monitor is connected while Ironbar is already running.

src/clients/networkmanager/event.rs

@@ -1,13 +1,18 @@
 use crate::clients::networkmanager::dbus::{DeviceState, DeviceType};
 
 #[derive(Debug, Clone)]
-pub enum Event {
-    DeviceAdded {
-        interface: String,
-    },
+pub enum ClientToModuleEvent {
     DeviceStateChanged {
         interface: String,
         r#type: DeviceType,
         state: DeviceState,
     },
+    DeviceRemoved {
+        interface: String,
+    },
+}
+
+#[derive(Debug, Clone)]
+pub enum ModuleToClientEvent {
+    NewController,
 }