Add client notification (#771)

* ClientNotification WIP

* Test

* ClientNotification WIP

* Add client notification dialog and related functionality

* Update ClientNotificationDialog.tsx

---------

Co-authored-by: philon- <philon-@users.noreply.github.com>

packages/core/src/utils/eventSystem.ts

@@ -330,6 +330,15 @@ export class EventSystem {
     PacketMetadata<Uint8Array>
   > = new SimpleEventDispatcher<PacketMetadata<Uint8Array>>();
 
+  /**
+   * Fires when a new MeshPacket message containing a ClientNotification packet has been
+   * received from device
+   *
+   * @event onClientNotificationPacket
+   */
+  public readonly onClientNotificationPacket: SimpleEventDispatcher<Protobuf.Mesh.ClientNotification> =
+    new SimpleEventDispatcher<Protobuf.Mesh.ClientNotification>();
+
   /**
    * Fires when the devices connection or configuration status changes
    *