chore: add i18n release hardening gates

scripts/i18n-phase7-smoke.mjs

@@ -0,0 +1,19 @@
+import { execFileSync } from "node:child_process";
+import fs from "node:fs";
+import path from "node:path";
+
+const distDir = path.join(process.cwd(), ".next", "i18n-phase7-smoke-dist");
+
+execFileSync("./node_modules/.bin/tsc", ["-p", "tsconfig.i18n-phase7-smoke.json"], {
+  cwd: process.cwd(),
+  stdio: "inherit",
+});
+
+const serverOnlyStubDir = path.join(distDir, "node_modules", "server-only");
+fs.mkdirSync(serverOnlyStubDir, { recursive: true });
+fs.writeFileSync(path.join(serverOnlyStubDir, "index.js"), "\n");
+
+execFileSync(process.execPath, [path.join(distDir, "scripts", "i18n-phase7-smoke.js")], {
+  cwd: process.cwd(),
+  stdio: "inherit",
+});