feat: add UserResource with is_admin toggle and delete

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

app/Filament/Resources/UserResource/Pages/EditUser.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace App\Filament\Resources\UserResource\Pages;
+
+use App\Filament\Resources\UserResource;
+use Filament\Resources\Pages\EditRecord;
+
+class EditUser extends EditRecord
+{
+    protected static string $resource = UserResource::class;
+
+    protected function getHeaderActions(): array
+    {
+        return [];
+    }
+}