feat: comprehensive SEO system with keywords and schema markup

- Add 4-locale keyword configurations (SR, EN, DE, FR)
- Create schema generators (Product, Organization, Breadcrumb)
- Add React components for JSON-LD rendering
- Implement caching for keyword performance
- Abstract all SEO logic for maintainability

src/components/seo/ProductSchema.tsx

@@ -0,0 +1,67 @@
+import { JsonLd } from './JsonLd';
+import { generateProductSchema, generateCategorizedProductSchema } from '@/lib/seo/schema/productSchema';
+import { generateProductBreadcrumbs } from '@/lib/seo/schema/breadcrumbSchema';
+import { Locale } from '@/lib/seo/keywords/types';
+
+interface ProductSchemaProps {
+  baseUrl: string;
+  locale: Locale;
+  product: {
+    name: string;
+    slug: string;
+    description: string;
+    images: string[];
+    price: {
+      amount: number;
+      currency: string;
+    };
+    sku?: string;
+    availability?: 'InStock' | 'OutOfStock' | 'PreOrder';
+  };
+  category?: 'antiAging' | 'hydration' | 'glow' | 'sensitive' | 'natural' | 'organic';
+  rating?: {
+    value: number;
+    count: number;
+  };
+  includeBreadcrumbs?: boolean;
+}
+
+/**
+ * Product schema component
+ * Renders Product + BreadcrumbList JSON-LD schemas
+ * 
+ * @param baseUrl - Site base URL
+ * @param locale - Current locale
+ * @param product - Product data object
+ * @param category - Optional category for enhanced targeting
+ * @param rating - Optional aggregate rating data
+ * @param includeBreadcrumbs - Whether to include breadcrumb schema (default: true)
+ */
+export function ProductSchema({
+  baseUrl,
+  locale,
+  product,
+  category,
+  rating,
+  includeBreadcrumbs = true,
+}: ProductSchemaProps) {
+  // Generate product schema
+  const productSchema = category
+    ? generateCategorizedProductSchema(baseUrl, locale, { ...product, rating }, category)
+    : generateProductSchema(baseUrl, locale, { ...product, rating });
+
+  // Generate breadcrumbs if requested
+  if (includeBreadcrumbs) {
+    const breadcrumbSchema = generateProductBreadcrumbs(
+      baseUrl,
+      locale,
+      product.name,
+      product.slug
+    );
+    return <JsonLd data={[productSchema, breadcrumbSchema]} />;
+  }
+
+  return <JsonLd data={productSchema} />;
+}
+
+export default ProductSchema;