chore(vendor): import pi 1.3.0

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: 71023aec1546d6d677a65669c5665c0927ce0dd0

third_party/pi/packages/codemode/examples/cloudflare/sandbox/src/index.ts

@@ -0,0 +1,7 @@
+// The whole sandbox Worker: one Durable Object class that runs codemode scripts for callers bound to
+// it. Only Workers with a binding can reach the class; HTTP requests get a 404.
+export { CodemodeSandboxDurableObject as CodemodeSandbox } from "@earendil-works/pi-codemode/cloudflare";
+
+export default {
+	fetch: () => new Response("Not found", { status: 404 }),
+};