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>

routes/web.php

@@ -0,0 +1,18 @@
+<?php
+
+use Illuminate\Support\Facades\Route;
+
+/*
+|--------------------------------------------------------------------------
+| Web Routes
+|--------------------------------------------------------------------------
+|
+| Here is where you can register web routes for your application. These
+| routes are loaded by the RouteServiceProvider within a group which
+| contains the "web" middleware group. Now create something great!
+|
+*/
+
+Route::get('/', function () {
+    return view('welcome');
+});