feat: add new adapter for Rsbuild

[9aoy]

Summary

Support extend Rstest configuration from Rsbuild config file via @rstest/adapter-rsbuild.

import { defineConfig } from '@rstest/core';
import { withRsbuildConfig } from '@rstest/adapter-rsbuild`';

export default defineConfig({
  // Automatically read rsbuild.config.ts and convert to Rstest configuration
  extends: withRsbuildConfig(),
  // Other test configurations
  coverage: {
    // ...
  },
});

Related Links

Checklist

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

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[Copilot]

Pull request overview

This PR adds @rstest/adapter-rsbuild, a new official adapter that allows Rstest to automatically inherit configuration from Rsbuild config files. This enables seamless integration between Rstest and Rsbuild projects, eliminating configuration duplication.

Key Changes

• Introduces @rstest/adapter-rsbuild package with withRsbuildConfig() function for extending Rstest config from Rsbuild
• Adds comprehensive documentation in both English and Chinese explaining installation, usage, and configuration mapping
• Updates the React example to demonstrate the adapter usage, migrating from jsdom to happy-dom

Reviewed changes

Copilot reviewed 15 out of 16 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
packages/adapter-rsbuild/src/index.ts	Core implementation of the adapter with config loading and conversion logic
packages/adapter-rsbuild/tests/index.test.ts	Test suite covering config loading, environment merging, and error handling
packages/adapter-rsbuild/package.json	Package configuration with dependencies and metadata
packages/adapter-rsbuild/README.md	Comprehensive adapter documentation with usage examples
packages/adapter-rsbuild/rslib.config.mts	Build configuration for the adapter package
packages/adapter-rsbuild/rstest.config.ts	Test configuration for the adapter package
packages/adapter-rsbuild/tsconfig.json	TypeScript configuration for the adapter
website/docs/en/guide/integration/rsbuild.mdx	English integration guide
website/docs/zh/guide/integration/rsbuild.mdx	Chinese integration guide
website/docs/en/guide/integration/adapters.mdx	Added Rsbuild adapter reference
website/docs/zh/guide/integration/adapters.mdx	Added Rsbuild adapter reference (Chinese)
website/docs/en/guide/integration/_meta.json	Updated navigation metadata
website/docs/zh/guide/integration/_meta.json	Updated navigation metadata (Chinese)
examples/react/rstest.config.ts	Refactored to use the new adapter
examples/react/package.json	Updated dependencies to use adapter and happy-dom
pnpm-lock.yaml	Dependency updates for new adapter package

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

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