fix: Remove hardcoded dev mode filters from woonoow.php

🐛 CRITICAL FIX - Root Cause Found!
The plugin had hardcoded dev mode filters that forced EVERYONE into dev mode:
- add_filter('woonoow/admin_is_dev', '__return_true');
- add_filter('woonoow/admin_dev_server', fn() => 'https://woonoow.local:5173');

This caused:
- ✗ SPA trying to load from localhost:5173
- ✗ Loading @react-refresh and main.tsx (dev files)
- ✗ Not loading app.js and app.css (production files)

✅ Solution:
- Removed hardcoded filters from woonoow.php
- Commented them out with instructions
- Added debug logging to is_dev_mode()
- Updated installation checker to detect this issue

📝 For Developers:
If you need dev mode, add to wp-config.php:
define('WOONOOW_ADMIN_DEV', true);

Or use filter in your development plugin:
add_filter('woonoow/admin_is_dev', '__return_true');

🎯 Result:
- Production mode by default (no config needed)
- Dev mode only when explicitly enabled
- Better UX - plugin works out of the box

woonoow.php

@@ -43,5 +43,6 @@ register_activation_hook(__FILE__, function () {
     update_option('woocommerce_custom_orders_table_migration_enabled', 'yes');
 });
 
-add_filter('woonoow/admin_is_dev', '__return_true');
-add_filter('woonoow/admin_dev_server', fn() => 'https://woonoow.local:5173');
+// Dev mode filters removed - use wp-config.php if needed:
+// add_filter('woonoow/admin_is_dev', '__return_true');
+// add_filter('woonoow/admin_dev_server', fn() => 'https://woonoow.local:5173');