Initial commit: Pireon Admin — headless admin panel and public API

Laravel 13 + Filament 5 admin panel and REST API for a non-profit developer
collective, backed by the Pireon OAuth identity server. The public site is a
separate, server-rendered application consuming /api/public/v1.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

lang/es/auth.php

@@ -0,0 +1,9 @@
+<?php
+
+declare(strict_types=1);
+
+return [
+    'failed' => 'Estas credenciales no coinciden con nuestros registros.',
+    'password' => 'La contraseña es incorrecta.',
+    'throttle' => 'Demasiados intentos de acceso. Por favor intente nuevamente en :seconds segundos.',
+];