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/TestController.php

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