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 🚀

admin-spa/package.json

@@ -29,6 +29,10 @@
         "@radix-ui/react-switch": "^1.2.6",
         "@radix-ui/react-tabs": "^1.1.13",
         "@tanstack/react-query": "^5.90.5",
+        "@tiptap/extension-link": "^3.10.5",
+        "@tiptap/extension-placeholder": "^3.10.5",
+        "@tiptap/react": "^3.10.5",
+        "@tiptap/starter-kit": "^3.10.5",
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
         "cmdk": "^1.1.1",