feat(i18n): enhance data fetching and caching with language support

- Update data-fetching functions to include language and translation request parameters for improved internationalization.
- Modify caching logic in Content and GrowTentKonfigurator components to utilize language-aware cache keys.
- Ensure ProductDetailPage retrieves cached data based on the current language, enhancing user experience across different locales.
- Integrate language handling in various components to maintain consistency in data management and rendering.

src/components/Content.js

@@ -176,7 +176,8 @@ function setCachedCategoryData(categoryId, data, language = 'de') {
   try {
     const cacheKey = `categoryProducts_${categoryId}_${language}`;
     if(data.products) for(const product of data.products) {
-      window.productDetailCache[product.id] = product;
+      const productCacheKey = `product_${product.id}_${language}`;
+      window.productDetailCache[productCacheKey] = product;
     }
     window.productCache[cacheKey] = {
       ...data,