feat: unify package artifact validation (#10197)

* feat: unify package artifact validation

* fix: restrict local artifact output paths

* fix: clarify package artifact module names

* feat: support pnpm package artifact consumers

* fix: preserve local release package installs

Keep npm and Bun consumer installs as runnable release artifacts while retaining isolated validation for other packages. Simplify smoke fixtures and avoid redundant release work.

scripts/pack-packages.mjs

@@ -0,0 +1,48 @@
+#!/usr/bin/env node
+
+import { resolve } from "node:path";
+import { parseArgs } from "node:util";
+import { produceArtifactSet } from "./package-artifacts.mjs";
+
+function printUsage() {
+	console.log(`Usage: node scripts/pack-packages.mjs --out <dir> [options]
+
+Builds every public package and writes one coherent local artifact set.
+
+Options:
+  --out <dir>            Output directory; .artifacts/ is ignored by Git
+  --force                Replace an existing output directory
+  --offline-model-data   Build with already-hydrated model data
+  --skip-build           Pack existing build output without rebuilding
+  --help                 Show this help
+`);
+}
+
+const { values } = parseArgs({
+	options: {
+		force: { type: "boolean", default: false },
+		help: { type: "boolean", default: false },
+		"offline-model-data": { type: "boolean", default: false },
+		out: { type: "string" },
+		"skip-build": { type: "boolean", default: false },
+	},
+});
+if (values.help) {
+	printUsage();
+	process.exit(0);
+}
+if (!values.out) throw new Error("--out is required");
+
+const artifactSet = produceArtifactSet({
+	build: !values["skip-build"],
+	force: values.force,
+	offlineModelData: values["offline-model-data"],
+	outDir: values.out,
+	repoRoot: process.cwd(),
+});
+console.log(`\nLocal package artifacts created: ${artifactSet.artifactDirectory}`);
+console.log(`Manifest: ${artifactSet.manifestPath}`);
+console.log("\nConnect an external npm project with:");
+console.log(
+	`  node ${resolve("scripts/use-local-packages.mjs")} --manifest ${artifactSet.manifestPath} --consumer <project> --package <name>`,
+);