feat: make dashboard and sidebar dynamic

app/Http/Controllers/Admin/DashboardController.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Http\Controllers\Admin;
+
+use App\Http\Controllers\Controller;
+use App\Models\Comment;
+use App\Models\Flight;
+use App\Models\Tour;
+use App\Models\User;
+use Illuminate\Http\Request;
+
+class DashboardController extends Controller
+{
+    public function index()
+    {
+        $recentComments = Comment::with(['user', 'commentable'])
+            ->latest()
+            ->paginate(5);
+
+        $totalUser = User::count();
+        $totalTours = Tour::count();
+        $totalFlights = Flight::count();
+
+        return view('admin.dashboard', compact('totalUser', 'totalTours', 'totalFlights' , 'recentComments'));
+    }
+}