fix: update Open Graph image generation to include logo

This commit modifies the Open Graph image generation in `route.tsx` to embed the SettleMint logo directly in the image response. The logo is now included as an SVG data URL, ensuring it is available at build time and enhancing the visual representation of the site on social media platforms.

Author: roderik

src/app/layout.tsx

@@ -18,6 +18,9 @@ const robotoMono = Roboto_Mono({
 });
 
 export const metadata: Metadata = {
+  metadataBase: new URL(
+    process.env.NEXT_PUBLIC_SITE_URL || "https://console.settlemint.com"
+  ),
   other: {
     "color-scheme": "light dark",
   },