docs: add rate-limit component documentation

[Copilot]

The rate-limit component exists in src/ but was missing from the documentation.

Changes

• Documentation files - Added rate-limit.md for all 4 languages (zh-cn, en, zh-tw, zh-hk)
• Sidebar navigation - Added Rate Limit entry to all language sidebars in alphabetical order

Documentation Coverage

• Multiple algorithms: Fixed Window, Sliding Window, Token Bucket, Leaky Bucket
• Annotation-based rate limiting with #[RateLimit]
• Middleware support via RateLimitMiddleware
• AutoSort for multiple rate limit annotations
• Key placeholders and custom rate limiter implementation
• Configuration and practical examples

#[RateLimit(maxAttempts: 60, decay: 60)]
public function index()
{
    // Rate limited: 60 requests per 60 seconds
}

All 48 components now have corresponding documentation.

Original prompt

根据项目最新代码，更新 @docs 文档

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[Copilot]

Pull request overview

This pull request adds comprehensive documentation for the rate-limit component across all four supported languages (English, Simplified Chinese, Traditional Chinese, and Hong Kong Chinese). The component provides rate limiting functionality for Hyperf with support for multiple algorithms including fixed window, sliding window, token bucket, and leaky bucket.

Key Changes

• Added complete rate-limit.md documentation files for all 4 language directories covering installation, features, usage patterns, algorithms, configuration, and practical examples
• Updated sidebar navigation files to include the Rate Limit entry in alphabetical order (between Purifier and Recaptcha) for all languages
• Documentation covers both annotation-based and middleware-based rate limiting approaches with extensive code examples

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
docs/en/components/rate-limit.md	English documentation for rate-limit component with comprehensive examples and API reference
docs/zh-cn/components/rate-limit.md	Simplified Chinese documentation for rate-limit component
docs/zh-tw/components/rate-limit.md	Traditional Chinese documentation for rate-limit component
docs/zh-hk/components/rate-limit.md	Hong Kong Chinese documentation for rate-limit component
docs/.vitepress/src/en/sidebars.ts	Added Rate Limit navigation entry to English sidebar in correct alphabetical position
docs/.vitepress/src/zh-cn/sidebars.ts	Added Rate Limit navigation entry to Simplified Chinese sidebar
docs/.vitepress/src/zh-tw/sidebars.ts	Added Rate Limit navigation entry to Traditional Chinese sidebar
docs/.vitepress/src/zh-hk/sidebars.ts	Added Rate Limit navigation entry to Hong Kong Chinese sidebar

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