feat: Move Trello card to Packing when inspection is passed

- Create InspectionPassed event
- Create MoveCardToPackingOnInspectionPassed listener
- Register event listener in EventServiceProvider
- Dispatch event when markInspectionPassed() is called

Now when an order passes inspection on the ops page, the Trello card
automatically moves from Inspection to Packing list.

app/Events/InspectionPassed.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Events;
+
+use App\Models\Order;
+use Illuminate\Broadcasting\Channel;
+use Illuminate\Broadcasting\InteractsWithBroadcasting;
+use Illuminate\Broadcasting\PrivateChannel;
+use Illuminate\Foundation\Events\Dispatchable;
+use Illuminate\Queue\SerializesModels;
+
+class InspectionPassed
+{
+    use Dispatchable, SerializesModels;
+
+    public function __construct(
+        public Order $order,
+    ) {}
+
+    public function broadcastOn(): array
+    {
+        return [
+            new PrivateChannel('channel-name'),
+        ];
+    }
+}