refactor sitemap generation and navigation handling; remove old GenerateSitemap command, update to use tasks for better organization, and enhance navigation data retrieval

app/Containers/AppStructure/Tasks/GetNavigationDataTask.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace App\Containers\AppStructure\Tasks;
+
+use App\Containers\AppStructure\Models\MainSection;
+
+class GetNavigationDataTask
+{
+    public function run()
+    {
+        return MainSection::with('subSections.pages')
+            ->orderBy('sort', 'asc')
+            ->get();
+    }
+}