chore(vendor): import pi 0.85.1

Imported as a linear vendor commit so forge rebases do not replay the upstream root tree.

git-subtree-dir: third_party/pi

git-subtree-split: d981de1229ef899957bbe968bc8dcda02a21f477

third_party/pi/packages/ai/src/providers/data-json.d.ts

@@ -0,0 +1,4 @@
+declare module "*.json" {
+	const value: unknown;
+	export default value;
+}