Chore/add dependency audit workflow

[Gagan202005]

✅ Summary

This PR adds a GitHub Actions workflow to run npm dependency security audit on a schedule (and/or PRs) to detect vulnerable packages early.

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🔧 Changes Included

• Added Dependency Audit GitHub Actions workflow
• Runs npm audit --audit-level=high
• Configured as non-blocking (|| true) to avoid failing CI until vulnerabilities are resolved

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✅ Why this change?

• Helps track high/critical security vulnerabilities in dependencies
• Improves security visibility for maintainers
• Encourages proactive dependency updates

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🧪 Testing Done

• Workflow file validated
• Verified the command runs successfully in CI (non-blocking)

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📌 Notes

• The repo currently reports some vulnerabilities via npm audit
• Once dependencies are updated, maintainers can remove || true to make this workflow strict/blocking.