Add Lenis smooth scrolling to landing

Author: gbrlpzz

package.json

@@ -30,6 +30,7 @@
     "@supabase/supabase-js": "2.112.3",
     "@vercel/analytics": "^2.0.1",
     "fflate": "0.8.3",
+    "lenis": "^1.3.26",
     "react": "19.2.8",
     "react-dom": "19.2.8",
     "tus-js-client": "4.3.1",