feat: implement sharing page

components/footer.tsx

@@ -0,0 +1,23 @@
+import React from 'react'
+
+import { ExternalLink } from '@/components/external-link'
+import { cn } from '@/lib/utils'
+
+export function FooterText({ className, ...props }: React.ComponentProps<'p'>) {
+  return (
+    <p
+      className={cn(
+        'px-2 text-center text-xs leading-normal text-muted-foreground',
+        className
+      )}
+      {...props}
+    >
+      Open source AI chatbot built with{' '}
+      <ExternalLink href="https://nextjs.org">Next.js</ExternalLink> and{' '}
+      <ExternalLink href="https://vercel.com/storage/kv">
+        Vercel KV
+      </ExternalLink>
+      .
+    </p>
+  )
+}