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/Commands/Sales/CreateSaleCommand.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Commands\Sales;
+
+use App\Commands\Command;
+use App\DataObjects\CreateSaleDTO;
+use App\Models\Sale;
+use Illuminate\Support\Facades\Auth;
+use Illuminate\Support\Facades\DB;
+
+class CreateSaleCommand implements Command
+{
+    public function execute(array $data): Sale
+    {
+        return DB::transaction(function () use ($data, &$sale) {
+            $tData = new CreateSaleDTO(
+                reference_number: $data['current_series'],
+                happened_on: \Carbon\Carbon::parse($data['happened_on']),
+                branch_id: $data['branch_id'],
+                user_id: Auth::user()->id,
+            );
+
+            return Sale::create($tData->toArray());
+        });
+
+    }
+}