docs: add reporters guide and node API

[9aoy]

Summary

Add reporters guide and node API document.

Related Links

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

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[Copilot]

Pull request overview

This PR adds comprehensive documentation for the reporters feature in Rstest, including both user guides and API references in English and Chinese. The documentation covers built-in reporters (default, verbose, GitHub Actions, and JUnit) and provides guidance for creating custom reporters.

Key Changes

• Added reporters guide documentation explaining usage and built-in reporters
• Refactored configuration documentation to focus on usage patterns rather than implementation details
• Added Node API documentation for custom reporter implementation

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 15 comments.

Show a summary per file

File	Description
website/docs/zh/guide/basic/reporters.mdx	Chinese guide for reporters with usage examples and built-in reporter descriptions
website/docs/zh/guide/basic/_meta.json	Added reporters to the Chinese basic guide navigation
website/docs/zh/config/test/reporters.mdx	Chinese configuration reference refactored to show usage patterns
website/docs/zh/api/node-api/reporter.mdx	Chinese API documentation for custom reporter interface
website/docs/zh/api/node-api/_meta.json	Added reporter to Chinese Node API navigation
website/docs/zh/api/_meta.json	Added Node API section header to Chinese API navigation
website/docs/en/guide/basic/reporters.mdx	English guide for reporters with usage examples and built-in reporter descriptions
website/docs/en/guide/basic/_meta.json	Added reporters to the English basic guide navigation
website/docs/en/config/test/reporters.mdx	English configuration reference refactored to show usage patterns
website/docs/en/api/node-api/reporter.mdx	English API documentation for custom reporter interface
website/docs/en/api/node-api/_meta.json	Added reporter to English Node API navigation
website/docs/en/api/_meta.json	Added Node API section header to English API navigation

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[Copilot]

Missing closing backticks for code block. The code block starting at line 65 should end with three backticks (```), but line 72 shows four backticks (````). This will cause incorrect markdown rendering.