fix: rename search-song route to search

Author: Bentroen

apps/frontend/src/app/(content)/search-song/page.tsx renamed to apps/frontend/src/app/(content)/search/page.tsx

@@ -11,7 +11,7 @@ export function SearchBar() {
 
   const handleSearch = () => {
     if (searchQuery.trim()) {
-      router.push(`/search-song?q=${encodeURIComponent(searchQuery.trim())}`);
+      router.push(`/search?q=${encodeURIComponent(searchQuery.trim())}`);
     }
   };