Fix CI: Add package-lock.json to repository

[pouyanafisi]

This PR fixes GitHub Actions workflow errors by committing the package-lock.json file.

Problem

GitHub Actions workflows were failing with:

Error: Dependencies lock file is not found. Supported file patterns: package-lock.json,npm-shrinkwrap.json,yarn.lock

Solution

• Remove package-lock.json from .gitignore
• Commit package-lock.json to the repository

Why

• Lock files should be committed for reproducible builds
• Required by npm ci and cache: npm in GitHub Actions
• Ensures all environments (local, CI, production) use the same dependency versions