Migrate backend to Porto architecture and fix minor bugs

- Fully transitioned the backend to the Porto architectural pattern
- Improved code organization and maintainability
- Fixed minor bugs and inconsistencies

app/Containers/Widget/UI/API/Controllers/ClientWidgetPageReferenceListController.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Containers\Widget\UI\API\Controllers;
+
+use App\Containers\Widget\Models\PageReferenceList;
+use App\Containers\Widget\UI\API\Transformers\PageReferenceListResource;
+use App\Ship\Controllers\Controller;
+use App\Ship\Enums\CacheKeys;
+use Illuminate\Support\Facades\Cache;
+
+class ClientWidgetPageReferenceListController extends Controller
+{
+    public function show(string $slug)
+    {
+        return Cache::remember(
+            CacheKeys::PAGE_REFERENCE_LIST_PREFIX->value . $slug,
+            now()->addWeek(), // Кешируем на неделю, так как справочники меняются редко
+            function () use ($slug) {
+                return new PageReferenceListResource(
+                    PageReferenceList::query()
+                        ->where('slug', $slug)
+                        ->firstOrFail()
+                );
+            }
+        );
+    }
+}