feat: Implement price list management and import functionality

- Added ListinoRelationManager for managing price lists associated with models.
- Introduced ImportaListiniAction for importing price lists from Excel files.
- Created ListinoPrezzo model to represent price entries in the database.
- Developed ListinoExcelParser for parsing Excel files containing price lists.
- Implemented ListinoImporter to handle the import logic and associations.
- Added migration for creating listino_prezzi table and converting measures to mm.
- Updated frontend logic to handle new price list features and validations.
- Enhanced tests for price list import and conversion functionalities.

backoffice/routes/api.php

@@ -14,6 +14,7 @@ Route::get('config', fn () => response()->json([
 // Catalogo prodotti (sistemi e modelli con icone) per il configuratore.
 Route::get('sistemi', [CatalogoController::class, 'sistemi']);
 Route::get('sistemi/{codice}', [CatalogoController::class, 'sistemaPerCodice']);
+Route::get('sistemi/{codice}/modelli/{modello}/listino', [CatalogoController::class, 'listino']);
 
 Route::prefix('auth')->group(function () {
     Route::post('login', [AuthController::class, 'login']);