feat: add SmartLink component for internal and external links

The component automatically detects link type and applies appropriate
rendering with proper attributes for external links.

components/SmartLink.js

@@ -0,0 +1,27 @@
+import Link from 'next/link'
+import { siteConfig } from '@/lib/config'
+
+const SmartLink = ({ href, children, ...rest }) => {
+  const LINK = siteConfig('LINK')
+  const isExternal = href.startsWith('http') && !href.startsWith(LINK)
+
+  if (isExternal) {
+    return (
+      <a
+        href={href}
+        target='_blank'
+        rel='noopener noreferrer'
+        {...rest}>
+        {children}
+      </a>
+    )
+  }
+
+  return (
+    <Link href={href} {...rest}>
+      {children}
+    </Link>
+  )
+}
+
+export default SmartLink