feat: support coverage.reportsDirectory option

[9aoy]

Summary

support coverage.reportsDirectory option.

Related Links

Checklist

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

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[Copilot]

Pull Request Overview

This PR adds support for a configurable coverage.reportsDirectory option to allow users to specify where coverage reports should be generated, defaulting to './coverage'.

• Adds reportsDirectory field to coverage configuration types
• Updates the Istanbul coverage provider to use the configured directory
• Implements proper path resolution for both relative and absolute paths

Reviewed Changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
packages/coverage-istanbul/src/provider.ts	Updates coverage provider to use configurable reports directory and imports proper type
packages/core/src/types/coverage.ts	Adds reportsDirectory option to coverage types and imports proper CoverageMap type
packages/core/src/config.ts	Adds default reportsDirectory value and path resolution logic
packages/core/package.json	Adds istanbul-lib-coverage types dependency
e2e/test-coverage/index.test.ts	Adds test for custom reportsDirectory functionality
e2e/test-coverage/fixtures/rstest.reportsDirectory.config.ts	Test configuration for custom reports directory
e2e/projects/fixtures/rstest.coverage.config.ts	Coverage configuration for projects test
e2e/projects/fixtures/package.json	Package dependencies for projects test
e2e/projects/coverage.test.ts	Test coverage functionality in projects context

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

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