docs: add cluster templates tutorial skeleton DOC-2542

[brent-eritou]

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Good job! 👏👏👏

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📝 Describe the Change

add cluster templates tutorial skeleton

Include problem statement, dev and prod context,
workflow options, cost warning, outcomes, and
section header placeholders.

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💻 Changed Pages

• Standardize Cluster Provisioning and Maintenance with Cluster Templates

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🎫 Jira Tickets

DOC-2542

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[github-actions]

✅ Slack reviewers notified at 2026-02-09T17:45:27Z \n

[addetz]

I like the iterative approach! I left you some comments asking you for some rephrases, I'd like to review again once you address them, so ping me when you're done.