feat: Enhance email functionality and PDF generation for Sales Orders

- Enabled SMTP debugging in PHPMailer for better error tracking.
- Added a "Test send email" link in the Inventory Detail View for quick email testing.
- Implemented automatic PDF generation and email sending upon Sales Order creation.
- Created a new action for sending Sales Order emails with attached PDFs.
- Added a new AJAX action for testing outgoing email server configurations.
- Updated outgoing server settings to use new SMTP credentials.
- Improved email templates for better user experience.
- Added test scripts for validating PDF generation and email sending.

include/utils/UserInfoUtil.php

@@ -2318,4 +2318,15 @@ function appendFromClauseToQuery($query,$fromClause) {
 	return $query;
 }
 
+function getMySubordinates($roleid){
+	global $adb;
+	$subordinates = array();
+	$user_query = "select * from vw_users_with_roles where parentrole like '%::$roleid::%'";
+	$result2 = $adb->query($user_query);
+	while ($row = $adb->fetchByAssoc($result2)) {
+		array_push($subordinates, $row['user_name']);
+	}
+	return $subordinates ;
+}
+
 ?>