feat(wallets): implement wallet and transaction management with associated models, policies, and resources

app/Observers/UserObserver.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace App\Observers;
+
+use App\Models\User;
+use App\Services\WalletService;
+
+class UserObserver
+{
+    public function __construct(private WalletService $walletService) {}
+
+    public function created(User $user): void
+    {
+        $this->walletService->createForUser($user);
+    }
+}