Add timedelta as valid variable type

[cnotin]

Proposed change

timedelta should be a valid variable type. I don't know why it wasn't so I let you double-check in case there's a bigger issue I'm not aware of.

Separate PR, to actually add it: home-assistant/home-assistant.io#45180

Type of change

• Document existing features within Home Assistant
• Document new or changing features for which there is an existing pull request elsewhere: Add timedelta_string template function documentation home-assistant.io#45180
• Spelling or grammatical corrections, or rewording for improved clarity
• Changes to the backend of this documentation
• Remove stale or deprecated documentation

Checklist

• I have read and followed the documentation guidelines.
• I have verified that my changes render correctly in the documentation.

Additional information

• This PR fixes or closes issue: N/A
• Link to relevant existing code or pull request: Add timedelta_string template function documentation home-assistant.io#45180

[coderabbitai]

📝 Walkthrough

Walkthrough

A documentation page is updated to clarify the type: configuration key, specifying allowed values, multi-type syntax, and validation constraints for map/list and boolean types.

Changes

Documentation Update

Layer / File(s)	Summary
Available Keys Documentation docs/documenting/create-page.md	The type: bullet entry is clarified to document allowed type values (map, list, selector, any), multi-type syntax (e.g., [string, integer]), and validation constraints: map/list require keys:, and boolean requires default:.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: adding timedelta as a valid variable type to the documentation.
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.
Description check	✅ Passed	The PR description follows the template structure with all required sections completed: proposed change, type of change (with single selection), checklist items marked, and additional information provided.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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