feat: Add Trainer Login link to admin sidebar menu

- Add a direct link to the Trainer Login page under HVAC Community Events menu
- Link directly to the community-login frontend page
- Maintain consistent positioning in the menu structure

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

wordpress-dev/wordpress/wp-content/plugins/hvac-community-events/includes/class-hvac-settings.php

@@ -44,6 +44,17 @@ class HVAC_Settings {
             'hvac-ce-dashboard',
             array($this, 'dashboard_page')
         );
+        
+        // Add trainer login link submenu
+        $community_login_url = home_url('community-login');
+        add_submenu_page(
+            'hvac-community-events',
+            __('Trainer Login', 'hvac-ce'),
+            __('Trainer Login', 'hvac-ce'),
+            'manage_options',
+            $community_login_url,
+            null
+        );
     }
 
     public function register_settings() {