fix: build package before compiling docs for Vercel

Author: gonzyui

package.json

@@ -34,7 +34,7 @@
     "typecheck": "tsc --noEmit",
     "prepublishOnly": "pnpm run build",
     "docs:dev": "vitepress dev docs",
-    "docs:build": "vitepress build docs",
+    "docs:build": "pnpm run build && vitepress build docs",
     "docs:preview": "vitepress preview docs"
   },
   "keywords": [