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/scripts/use-local-packages.mjs

@@ -0,0 +1,41 @@
+#!/usr/bin/env node
+
+import { resolve } from "node:path";
+import { parseArgs } from "node:util";
+import { wireConsumer } from "./local-package-install.mjs";
+import { readArtifactSet } from "./package-artifacts.mjs";
+
+function printUsage() {
+	console.log(`Usage: node scripts/use-local-packages.mjs --manifest <path> --consumer <dir> --package <name> [--package <name> ...] [--package-manager npm|pnpm]
+
+Updates an external project's package configuration to use direct packages and
+all transitive Pi packages from a local package artifact set. Defaults to npm.
+`);
+}
+
+const { values } = parseArgs({
+	options: {
+		consumer: { type: "string" },
+		help: { type: "boolean", default: false },
+		manifest: { type: "string" },
+		package: { type: "string", multiple: true, default: [] },
+		"package-manager": { type: "string", default: "npm" },
+	},
+});
+if (values.help) {
+	printUsage();
+	process.exit(0);
+}
+if (!values.manifest) throw new Error("--manifest is required");
+if (!values.consumer) throw new Error("--consumer is required");
+if (values.package.length === 0) throw new Error("At least one --package is required");
+if (values["package-manager"] !== "npm" && values["package-manager"] !== "pnpm") {
+	throw new Error(`Unsupported package manager: ${values["package-manager"]}`);
+}
+
+const artifactSet = readArtifactSet(resolve(values.manifest));
+const consumerDirectory = resolve(values.consumer);
+wireConsumer({ artifactSet, consumerDirectory, packageManager: values["package-manager"], packageNames: values.package });
+
+console.log(`Updated ${consumerDirectory}/package.json from ${artifactSet.manifestPath}`);
+console.log(`Run ${values["package-manager"]} install --ignore-scripts in the consumer project.`);