refactor(sales): replace service with command and action pattern

- Replace SaleService with CreateSaleCommand and CreateSaleAction for better separation of concerns
- Move sale creation logic into dedicated command class following command pattern
- Update CreateSale.php to use new action instead of direct service call
- Wrap sale creation in database transaction for data consistency

app/Filament/Resources/SaleResource/Pages/CreateSale.php

@@ -2,6 +2,7 @@
 
 namespace App\Filament\Resources\SaleResource\Pages;
 
+use App\Actions\Sales\CreateSaleAction;
 use App\Actions\Transactions\CreateTransactionAction;
 use App\DataObjects\CreateTransactionDTO;
 use App\Filament\Resources\ClientResource;
@@ -83,7 +84,7 @@ class CreateSale extends CreateRecord
     {
         try {
             DB::beginTransaction();
-            $record = app(SaleService::class)->create($this->getFormDataMutation($data));
+            $record = app(CreateSaleAction::class)($this->getFormDataMutation($data));
             $branch = $record->branch;
 
             foreach ($transactions as $transaction) {