feat: remove obsolete glass configurations, add title import functionality

- Deleted the `vetro.json` file containing glass configurations.
- Introduced `ImportaTitoliAction` to facilitate importing model titles from Excel.
- Created `TitoliModelliImporter` for handling title import logic and updating existing models.
- Updated `SistemaResource` to include the new title import action.
- Modified `ConfigurazioneModello` to adjust the model name retrieval logic.
- Changed `ListinoImporter` to make the alias constant public.
- Added tests for title import functionality, ensuring correct updates and creation of new models.

backoffice/app/Support/Listini/ListinoImporter.php

@@ -11,7 +11,7 @@ use Illuminate\Support\Str;
 class ListinoImporter
 {
     // Codici del file con refusi noti rispetto al codice interno del modello.
-    private const ALIAS = [
+    public const ALIAS = [
         'finestra_wasistas' => 'finestra_vasistas',
     ];