docs(kibana): sync template standards updates

[mberlofa]

Summary

• update Kibana docs for the new self-contained default install with bundled Elasticsearch enabled
• sync production examples to explicitly disable bundled Elasticsearch before using secured external Elasticsearch
• add Kibana playground coverage for NetworkPolicy and networkPolicy.extraEgress

Validation

• npm run lint passed
• npm run format:check passed
• npm run build passed
• make site-sync-check CHART=kibana passed with required updates present
• make release-check REPO=site passed
• make attribution-check REPO=site passed

Chart PR: helmforgedev/charts#679

Summary by CodeRabbit

• New Features

  • Kibana is now available in the playground chart list.
  • Added new network and operations configuration options, including network policy and extra egress settings.

• Bug Fixes

  • The bundled Elasticsearch option now defaults to enabled for a smoother out-of-the-box setup.

• Documentation

  • Updated Kibana installation and configuration examples to reflect the latest defaults and secured Elasticsearch settings.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 0d2087dd-9cfd-4d63-a9e6-a4022a5aa106

📥 Commits

Reviewing files that changed from the base of the PR and between 365449a and edaaee0.

📒 Files selected for processing (3)

• src/data/playground-configs.ts
• src/pages/docs/charts/kibana.mdx
• src/pages/playground.astro

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📝 Walkthrough

Walkthrough

This PR changes the kibana chart's playground configuration default for bundled Elasticsearch to enabled, adds a Network And Operations section with network policy and egress fields, updates kibana documentation examples and values table accordingly, and registers kibana in the playground page's chart mapping.

Changes

Kibana Playground Config and Docs Update

Layer / File(s)	Summary
Playground config default and network policy fields src/data/playground-configs.ts	bundledElasticsearch.enabled default flipped to true, and a new Network And Operations section adds networkPolicy.enabled and extra egress CIDR/port fields.
Playground page registration src/pages/playground.astro	Adds kibana to siteSyncPlaygroundConfigs, making it eligible for the playground chart list.
Kibana documentation updates src/pages/docs/charts/kibana.mdx	Updates install command, secured Elasticsearch and production values examples, simplifies the Bundled Elasticsearch section, and updates the Values table with the new default and network policy rows.

Estimated code review effort: 2 (Simple) | ~10 minutes

Poem

A rabbit hopped through Kibana's YAML den,
Flipped a switch from false to true again,
Egress rules and CIDRs neatly penned,
Docs rewritten, playground charts extend,
Hop hop hooray, the config's a trusted friend!

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Title check	❓ Inconclusive	The title is related to the Kibana docs/playground sync, but it is vague and doesn’t state the main change clearly.	Use a more specific title like "docs(kibana): document bundled Elasticsearch default and NetworkPolicy playground updates".

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description check	✅ Passed	The description matches the template well with a Summary and Validation section, and no blog details are needed for these files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/kibana-template-standards-sync

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