Add package-lock.json for reproducible CI/CD builds

- Updated .gitignore to commit package-lock.json (required for GitHub Actions npm caching)
- Ensures consistent dependency versions across CI/CD environments
- Fixes GitHub Actions workflow test failure due to missing lock file

Author: oden3000

.gitignore

@@ -1,6 +1,6 @@
 # Dependencies
 node_modules/
-package-lock.json
+# Lock files are committed to ensure reproducible builds in CI/CD
 yarn.lock
 
 # Build output