Initial commit: Horux Backend API

- API REST para gestion de facturas electronicas mexicanas (CFDI)
- Laravel 9 con autenticacion OAuth 2.0 (Passport)
- Integracion con Syntage, Clerk y Facturama
- 30 modelos Eloquent, 39 controladores
- Documentacion completa en /docs

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

bootstrap/app.php

@@ -0,0 +1,55 @@
+<?php
+
+/*
+|--------------------------------------------------------------------------
+| Create The Application
+|--------------------------------------------------------------------------
+|
+| The first thing we will do is create a new Laravel application instance
+| which serves as the "glue" for all the components of Laravel, and is
+| the IoC container for the system binding all of the various parts.
+|
+*/
+
+$app = new Illuminate\Foundation\Application(
+    $_ENV['APP_BASE_PATH'] ?? dirname(__DIR__)
+);
+
+/*
+|--------------------------------------------------------------------------
+| Bind Important Interfaces
+|--------------------------------------------------------------------------
+|
+| Next, we need to bind some important interfaces into the container so
+| we will be able to resolve them when needed. The kernels serve the
+| incoming requests to this application from both the web and CLI.
+|
+*/
+
+$app->singleton(
+    Illuminate\Contracts\Http\Kernel::class,
+    App\Http\Kernel::class
+);
+
+$app->singleton(
+    Illuminate\Contracts\Console\Kernel::class,
+    App\Console\Kernel::class
+);
+
+$app->singleton(
+    Illuminate\Contracts\Debug\ExceptionHandler::class,
+    App\Exceptions\Handler::class
+);
+
+/*
+|--------------------------------------------------------------------------
+| Return The Application
+|--------------------------------------------------------------------------
+|
+| This script returns the application instance. The instance is given to
+| the calling script so we can separate the building of the instances
+| from the actual running of the application and sending responses.
+|
+*/
+
+return $app;