feat(ProductDetailPage): implement embedded product rendering and loading

- Add functionality to render embedded products from <product> tags in the product description.
- Introduce state management for embedded products and their images, including loading and error handling.
- Update localization files to include loading messages for embedded products.

src/i18n/locales/de/product.js

@@ -25,6 +25,7 @@ export default {
   "pickupPrice": "Abholpreis: 19,90 € pro Steckling.",
   "consistsOf": "Bestehend aus:",
   "loadingComponentDetails": "{{index}}. Lädt Komponent-Details...",
+  "loadingProduct": "Produkt wird geladen...",
   "individualPriceTotal": "Einzelpreis gesamt:",
   "setPrice": "Set-Preis:",
   "yourSavings": "Ihre Ersparnis:",