added import and export recurring bills

app/Imports/Purchases/Bills/Bills.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Imports\Purchases\Bills;
+
+use App\Abstracts\ImportMultipleSheets;
+use App\Imports\Purchases\Bills\Sheets\Bills as Base;
+use App\Imports\Purchases\Bills\Sheets\BillItems;
+use App\Imports\Purchases\Bills\Sheets\BillItemTaxes;
+use App\Imports\Purchases\Bills\Sheets\BillHistories;
+use App\Imports\Purchases\Bills\Sheets\BillTotals;
+use App\Imports\Purchases\Bills\Sheets\BillTransactions;
+
+class Bills extends ImportMultipleSheets
+{
+    public function sheets(): array
+    {
+        return [
+            'bills' => new Base(),
+            'bill_items' => new BillItems(),
+            'bill_item_taxes' => new BillItemTaxes(),
+            'bill_histories' => new BillHistories(),
+            'bill_totals' => new BillTotals(),
+            'bill_transactions' => new BillTransactions(),
+        ];
+    }
+}