feat: integrate SEO system into pages

- Add OrganizationSchema to root layout
- Add ProductSchema with metadata to product pages
- Add enhanced metadata to homepage with keywords
- Add enhanced metadata to products listing page
- Add noindex to checkout page via layout
- Implement canonical URLs, OpenGraph, and Twitter cards

src/app/layout.tsx

@@ -2,6 +2,7 @@ import "./globals.css";
 import type { Metadata, Viewport } from "next";
 import ErrorBoundary from "@/components/providers/ErrorBoundary";
 import { SUPPORTED_LOCALES } from "@/lib/i18n/locales";
+import { OrganizationSchema } from "@/components/seo";
 
 const baseUrl = process.env.NEXT_PUBLIC_SITE_URL || "https://dev.manoonoils.com";
 
@@ -43,6 +44,12 @@ export default async function RootLayout({
         <ErrorBoundary>
           {children}
         </ErrorBoundary>
+        <OrganizationSchema
+          baseUrl={baseUrl}
+          locale="sr"
+          logoUrl={`${baseUrl}/logo.png`}
+          email="info@manoonoils.com"
+        />
       </body>
     </html>
   );