feat: Rich text editor and email system integration

## ✅ Step 4-5: Rich Text Editor & Integration

### RichTextEditor Component (TipTap)
- ✅ Modern WYSIWYG editor for React
- ✅ Toolbar: Bold, Italic, Lists, Links, Undo/Redo
- ✅ Variable insertion with buttons
- ✅ Placeholder support
- ✅ Clean, minimal UI

### TemplateEditor Updated
- ✅ Replaced Textarea with RichTextEditor
- ✅ Variables shown as clickable buttons
- ✅ Better UX for content editing
- ✅ HTML output for email templates

### Bootstrap Integration
- ✅ EmailManager initialized on plugin load
- ✅ Hooks into WooCommerce events automatically
- ✅ Disables WC emails to prevent duplicates

### Plugin Constants
- ✅ WOONOOW_PATH for template paths
- ✅ WOONOOW_URL for assets
- ✅ WOONOOW_VERSION for versioning

### Dependencies
- ✅ @tiptap/react
- ✅ @tiptap/starter-kit
- ✅ @tiptap/extension-placeholder
- ✅ @tiptap/extension-link

---

**Status:** Core email system complete!
**Next:** Test and create content templates 🚀

includes/Core/Bootstrap.php

@@ -20,6 +20,7 @@ use WooNooW\Core\Mail\WooEmailOverride;
 use WooNooW\Core\DataStores\OrderStore;
 use WooNooW\Core\MediaUpload;
 use WooNooW\Core\Notifications\PushNotificationHandler;
+use WooNooW\Core\Notifications\EmailManager;
 use WooNooW\Core\ActivityLog\ActivityLogTable;
 use WooNooW\Branding;
 
@@ -33,6 +34,7 @@ class Bootstrap {
         Branding::init();
         MediaUpload::init();
         PushNotificationHandler::init();
+        EmailManager::instance(); // Initialize custom email system
         
         // Activity Log
         ActivityLogTable::create_table();