Consolidate Organization schema, add ItemList/Offer markup, expand FAQ

- Merge the duplicate Organization/LocalBusiness JSON-LD blocks (home's
  LocalBusiness + o-kompanii's Organization) into one shared
  getOrganizationSchema() call rendered on every page. Deliberately NOT
  wired through the root layout: fetches there get frozen into the
  static shell at build time (backend unreachable during image build)
  and never revalidate, silently serving stale data to crawlers - each
  page calls it directly instead, where revalidation is proven to work.
- Add optional ItemList schema on /uslugi and Offer/OfferCatalog schema
  on /aktsii; entity pages (/uslugi/[slug] Service, /blog/[slug]
  Article) reference the organization via @id instead of duplicating it.
- Add 8 more real FAQ entries (pricing model, contract terms,
  onboarding time, hybrid IT staff setup, supported stacks, backups,
  152-FZ compliance, escalation) and give every FAQ its own slug and
  dedicated /faq/[slug] page with its own title/H1/FAQPage schema,
  modeled on the one-topic-per-page pattern (h/t remontka.pro).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013otXCiTZsxdZ4SJKZ9wUky

public-site/components/sections/Faq.jsx

@@ -18,7 +18,16 @@ function FaqItem({ item }) {
         <span className="text-sm sm:text-base font-medium">{item.question}</span>
         <ChevronDown className={cx('h-4 w-4 flex-shrink-0 transition-transform', open && 'rotate-180')} />
       </button>
-      {open && <p className="pb-4 text-sm text-slate-600 dark:text-slate-400">{item.answer}</p>}
+      {open && (
+        <div className="pb-4">
+          <p className="text-sm text-slate-600 dark:text-slate-400">{item.answer}</p>
+          {item.slug && (
+            <Link href={`/faq/${item.slug}`} className="mt-2 inline-block text-xs text-emerald-500 font-medium hover:underline">
+              Открыть страницу вопроса →
+            </Link>
+          )}
+        </div>
+      )}
     </div>
   );
 }