Refactor navigation icon declarations in various resources for consistency; enhance Group model with new relationships and fillable properties; update Hotel and Pilgrim models with fillable attributes; improve table configurations across resources.

app/Http/Controllers/CurrencyRatesController.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use Illuminate\Http\JsonResponse;
+
+/**
+ * Currency rates controller
+ */
+class CurrencyRatesController extends Controller
+{
+    /**
+     * USD to sar
+     */
+    public function index(): JsonResponse
+    {
+        return response()->json([
+            'USD_TO_SAR' => '3.70',
+            'USD_TO_TMT' => '19.5',
+        ]);
+    }
+}

app/Http/Controllers/TestController.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Http\Controllers;
+
+class TestController extends Controller
+{
+    public function index()
+    {
+        return 'Plain test';
+    }
+}