chore: enforce pnpm 11 (#7465)

Author: Sheraff

package.json

@@ -6,6 +6,9 @@
     "url": "git+https://github.com/TanStack/router.git"
   },
   "packageManager": "pnpm@11.1.0",
+  "engines": {
+    "pnpm": ">=11.0.0"
+  },
   "type": "module",
   "scripts": {
     "cleanNodeModules": "pnpm -r exec rm -rf node_modules",