feat: update site URLs and enhance image handling

- Changed site URLs in docker-compose and deployment configurations to remove "www" prefix for consistency.
- Improved image handling by introducing warmPostCardImages function for pre-fetching images in posts and tags.
- Enhanced PostCard component with responsive image sizes for better performance.
- Updated layout to include robots meta tag and JSON-LD structured data for improved SEO.
- Added loading state for images in TopBanner component to enhance user experience.

src/routes/+page.server.ts

@@ -111,5 +111,6 @@ export const load: PageServerLoad = async ({ locals, fetch }) => {
       ? (page.seoTitle ?? page.headline ?? page.linkName ?? siteName)
       : siteName,
     seoDescription: page ? (page.seoDescription ?? page.subheadline ?? '') : '',
+    robots: (page as { seoMetaRobots?: string } | null)?.seoMetaRobots ?? undefined,
   };
 };