docs: add delimiterSpacing toggle and global option docs

[luisherranz]

Summary

The docs and playground integration for the delimiterSpacing option PR:

• feat(formatter): add delimiterSpacing option biome#8966

[netlify]

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[coderabbitai]

Walkthrough

This pull request introduces a new delimiterSpacing formatter option to Biome. The changes add support for controlling spaces inside delimiters (parentheses, brackets, angle brackets, and JSX braces) across JavaScript, JSON, and CSS formatters. The implementation spans documentation updates, playground configuration types, state management, UI controls in the settings tab, and the Biome worker integration to propagate the setting to the formatters.

Suggested labels

A-Documentation

Suggested reviewers

• arendjr
• Netail

🚥 Pre-merge checks | ✅ 2

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarises the main change: adding documentation and playground support for the delimiterSpacing option.
Description check	✅ Passed	The description clearly relates to the changeset by referencing the delimiterSpacing option integration and linking to the corresponding Biome core PR.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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