scripts/build-website.mjs/buildPrettier
async function buildPrettier() {
  // --- Build prettier for PR ---
  const packageJsonFile = path.join(PROJECT_ROOT, "package.json");
  const packageJsonContent = await fs.readFile(packageJsonFile);
  const packageJson = JSON.parse(packageJsonContent);
  await writeJson(packageJsonFile, {
    ...packageJson,
    version: `999.999.999-pr.${process.env.REVIEW_ID}`,
  });

  try {
    await runYarn("build", ["--playground", "--no-babel", "--clean"], {
      cwd: PROJECT_ROOT,
    });
  } finally {
    // restore
    await writeFile(packageJsonFile, packageJsonContent);
  }
}