Upgrade: Laravel 11, consolidación modelos App\Models\

- Actualización a Laravel 11.47.0
- Migración de modelos a namespace App\Models\
- Actualización de todos los controladores
- Actualización de configuraciones
- Documentación README.md

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

app/Models/FinishedContracts.php

@@ -2,14 +2,14 @@
 
 namespace App\Models;
 
-use App\User;
+use App\Models\User;
 use App\Models\Categories;
 use App\Models\Suppliers;
 use App\Models\Coupon;
 use App\Models\Status;
 use App\Models\Report;
 use App\Models\Payments;
-use App\NoHome;
+use App\Models\NoHome;
 use Illuminate\Database\Eloquent\Model;
 use TarfinLabs\LaravelSpatial\Casts\LocationCast;
 use TarfinLabs\LaravelSpatial\Traits\HasSpatial;