Refactor user session handling and permissions management

- Updated session variables to use 'authorization' array instead of 'username' for user identification across multiple files.
- Introduced a new function `getUserPermissions` to consolidate user permissions retrieval based on assigned roles.
- Modified API calls to use the new authorization structure and updated endpoints to v2.
- Enhanced language support by adding 'PL' to the list of supported languages.
- Cleaned up redundant code and improved session management during user login and registration processes.
- Added a new API endpoint for fetching user permissions based on user ID.

settings.php

@@ -8,7 +8,7 @@ $domain = getDomainName($_SERVER['SERVER_NAME']);
 $file = ((file_exists(dirname(__FILE__).'/custom/'.$domain.'/settings/'.$domain.'_config.php')) ? dirname(__FILE__).'/custom/'.$domain.'/settings/'.$domain.'_config.php' : dirname(__FILE__).'/settings/config.php');
 
 //Check if allowed
-if (isAllowed('settings',$_SESSION['profile'],$_SESSION['permission'],'R') === 0){
+if (isAllowed('settings',$_SESSION['authorization']['profile'],$_SESSION['authorization']['permission'],'R') === 0){
     header('location: index.php');
     exit;
 }
@@ -101,7 +101,7 @@ if (isset($_POST['submit']) && !empty($_POST)) {
 
 if (isset($_POST['geoupdate'])){
     //GEOLOCATION UPDATE 
-    geolocationUpdate($_SESSION['userkey']); 
+    geolocationUpdate($_SESSION['authorization']['userkey']); 
 }
 
 if (isset($_POST['updatecartest'])){