Refactor migration files for code style consistency

Updated migration files to use consistent PSR-12 code style, including brace placement, indentation, and spacing. Removed closing PHP tags and standardized 'or' in exit statements. No functional changes were made.

application/migrations/001_add_lotw_credentials.php

@@ -1,6 +1,7 @@
-<?php defined('BASEPATH') OR exit('No direct script access allowed');
+<?php defined('BASEPATH') or exit('No direct script access allowed');
 
-class Migration_add_lotw_credentials extends CI_Migration {
+class Migration_add_lotw_credentials extends CI_Migration
+{
 
 	public function up()
 	{
@@ -18,4 +19,3 @@ class Migration_add_lotw_credentials extends CI_Migration {
 		$this->dbforge->drop_column('users', 'user_lotw_password');
 	}
 }
-?>

application/migrations/002_add_config_table.php

@@ -1,6 +1,7 @@
-<?php defined('BASEPATH') OR exit('No direct script access allowed');
+<?php defined('BASEPATH') or exit('No direct script access allowed');
 
-class Migration_add_config_table extends CI_Migration {
+class Migration_add_config_table extends CI_Migration
+{
 
         public function up()
         {
@@ -38,4 +39,3 @@ class Migration_add_config_table extends CI_Migration {
                 $this->dbforge->drop_table('config');
         }
 }
-?>

application/migrations/003_add_lotw_login_url.php

@@ -1,6 +1,7 @@
-<?php defined('BASEPATH') OR exit('No direct script access allowed');
+<?php defined('BASEPATH') or exit('No direct script access allowed');
 
-class Migration_add_lotw_login_url extends CI_Migration {
+class Migration_add_lotw_login_url extends CI_Migration
+{
 
 	public function up()
 	{
@@ -18,4 +19,3 @@ class Migration_add_lotw_login_url extends CI_Migration {
 		$this->dbforge->drop_column('config', 'lotw_login_url');
 	}
 }
-?>

application/migrations/205_add_workable_dxcc_indexes.php

@@ -1,8 +1,9 @@
 <?php
 
-defined('BASEPATH') OR exit('No direct script access allowed');
+defined('BASEPATH') or exit('No direct script access allowed');
 
-class Migration_add_workable_dxcc_indexes extends CI_Migration {
+class Migration_add_workable_dxcc_indexes extends CI_Migration
+{
 
     public function up()
     {