Add pagefind to deps.

Author: nikoshell

package.json

@@ -28,6 +28,7 @@
     "date-fns": "^4.1.0",
     "date-fns-tz": "^3.2.0",
     "hastscript": "^9.0.0",
+    "pagefind": "^1.3.0",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "rehype-autolink-headings": "^7.1.0",