Add eval for describing nginx deployment

[dineshcsdev]

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[dineshcsdev]

✨ Added evaluation logic for describe nginx in k8s-bench.

🧪 What this PR does:

• Introduced basic round() usage to evaluate command output.
• Modified function name from round_ to round to simplify usage.
• Ensured compatibility with latest kubectl output format.

📦 Why this PR? This adds support to evaluate the output of kubectl describe nginx, improving the AI's ability to score command answers effectively.

🧠 Suggestions and feedback welcome!