chore: tidy up package.json before publishing

Author: birtles

.pnpmfile.cjs

@@ -0,0 +1,15 @@
+module.exports = { hooks: { beforePacking } };
+
+function beforePacking(pkg) {
+  // Remove development-only fields from published package
+  delete pkg.devDependencies;
+  delete pkg.engines;
+  delete pkg['lint-staged'];
+  delete pkg.prettier;
+  delete pkg.scripts;
+
+  // Add publication metadata
+  pkg.publishedAt = new Date().toISOString();
+
+  return pkg;
+}