feat(routes/shows): add the shows count to header

This patch updates the header on the shows page to include the number of
shows in our database. This number should ideally continue going up as I
add more import sources. Right now, it is around a modest 20K.

Author: nicholaschiang

app/routes/_header.shows._index.tsx

@@ -182,7 +182,9 @@ export default function ShowsPage() {
       className='fixed inset-x-0 top-10 bottom-0 overflow-auto'
     >
       <div className='p-6 mx-auto max-w-screen-xl'>
-        <h1 className='text-6xl mb-6 lowercase tracking-tighter'>shows</h1>
+        <h1 className='text-6xl mb-6 lowercase tracking-tighter'>
+          {count.toLocaleString()} shows
+        </h1>
         {shows.length > 0 ? (
           <ol
             className='-m-1'