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/durable/test/fixtures/utf8-byte-length-without-buffer.ts

@@ -0,0 +1,11 @@
+import { truncateHead, utf8ByteLength } from "../../src/truncate.ts";
+
+const inputs: string[] = JSON.parse(process.argv[2] ?? "[]");
+
+process.stdout.write(
+	JSON.stringify({
+		bufferAvailable: "Buffer" in globalThis,
+		lengths: inputs.map((input) => utf8ByteLength(input)),
+		head: truncateHead("aé🙂\nb", { maxBytes: 7, maxLines: 10 }),
+	}),
+);