feat: implement programmatic SEO solutions hub

- Add /solutions hub page with 10 category cards
- Add /solutions/by-concern directory page
- Add /solutions/by-oil directory page
- Add Solutions section to Footer with navigation links
- Add Breadcrumb component for solution pages
- Add translations for all solution pages (sr, en, de, fr)
- Fix ExitIntentDetector JSON parsing error
- Update sitemap with solution pages
- Create 3 sample solution pages with data files

src/components/programmatic-seo/FAQSchema.tsx

@@ -0,0 +1,16 @@
+import { generateFAQPageSchema } from "@/lib/programmatic-seo/schema";
+
+interface FAQSchemaProps {
+  questions: Array<{ question: string; answer: string }>;
+}
+
+export function FAQSchema({ questions }: FAQSchemaProps) {
+  const schema = generateFAQPageSchema(questions);
+
+  return (
+    <script
+      type="application/ld+json"
+      dangerouslySetInnerHTML={{ __html: JSON.stringify(schema) }}
+    />
+  );
+}