Add ESM bundle format, bump esbuild/vitest, add typecheck to build pipeline

Author: davidgamero

.husky/pre-commit

@@ -1,3 +1,9 @@
+npm run typecheck || {
+  echo ""
+  echo "❌ Type check failed."
+  echo "💡 Run 'npm run typecheck' to see errors."
+  exit 1
+}
 npm test
 npm run format-check || {
   echo ""