Added logic for columns missing invoice in transit

app/Filament/Resources/InvoiceInTransitResource.php

@@ -454,6 +454,22 @@ class InvoiceInTransitResource extends Resource
                                 return;
                             }
 
+                            $mandatoryColumns = 23;
+
+                            $firstRow = $rows[0] ?? [];
+
+                            if (count($firstRow) < $mandatoryColumns) {
+
+                                Notification::make()
+                                    ->title('Invalid Excel Format')
+                                    ->body('Few columns not found. Columns A to W are mandatory.')
+                                    ->danger()
+                                    ->persistent()
+                                    ->send();
+
+                                return;
+                            }
+
                             foreach ($rows as $index => $row)
                             {
                                 if ($index == 0) {