feat: add User model and users migration

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/Feature/AuthTest.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\User;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AuthTest extends TestCase
+{
+    use RefreshDatabase;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->app->make(\Spatie\Permission\PermissionRegistrar::class)->forgetCachedPermissions();
+    }
+
+    public function test_users_table_exists_and_user_can_be_created(): void
+    {
+        $user = User::create([
+            'name' => 'Test Admin',
+            'email' => 'admin@test.com',
+            'password' => bcrypt('password'),
+        ]);
+
+        $this->assertDatabaseHas('users', ['email' => 'admin@test.com']);
+    }
+}