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>

.gitignore

@@ -0,0 +1,36 @@
+/node_modules
+/public/build
+/public/hot
+/public/storage
+/storage/*.key
+/vendor
+.env
+.env.backup
+.env.production
+.phpunit.result.cache
+Homestead.json
+Homestead.yaml
+auth.json
+npm-debug.log
+yarn-error.log
+/.fleet
+/.idea
+/.vscode
+
+# Database dumps
+*.sql
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+storage/logs/*
+!storage/logs/.gitkeep
+
+# Cache
+bootstrap/cache/*.php
+storage/framework/cache/*
+storage/framework/sessions/*
+storage/framework/views/*