refactor: move backend in apps/backend

apps/backend/app/Providers/BroadcastServiceProvider.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace apps\backend\app\Providers;
+
+use Illuminate\Support\Facades\Broadcast;
+use Illuminate\Support\ServiceProvider;
+use function App\Providers\base_path;
+
+class BroadcastServiceProvider extends ServiceProvider
+{
+    public function boot(): void
+    {
+        Broadcast::routes(['middleware' => ['web', 'auth:sanctum']]);
+
+        require base_path('routes/channels.php');
+    }
+}