feat: support typescript-go checks

[Timeless0911]

Summary

This PR adds experimental TypeScript Go support by resolving @typescript/native-preview/package.json when typescript.tsgo is enabled, while preserving the regular project TypeScript path for non-tsgo checks.

Related Links

• https://github.com/rstackjs/ts-checker-rspack-plugin/releases/tag/v1.4.0
• https://github.com/rstackjs/ts-checker-rspack-plugin#typescript-go-support

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between 7316b1b and af518bc.

📒 Files selected for processing (1)

• src/index.ts

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📝 Walkthrough

Walkthrough

This PR adds experimental TypeScript Go (tsgo) support to the rsbuild type-check plugin. It updates README defaults and docs, modifies package.json and pnpm workspace config to include and mark @typescript/native-preview as an optional peer/dev dependency, adds a project-root package resolution helper, resolves both regular typescript and @typescript/native-preview paths from the project root, sets tsgo: false by default, conditionally rewrites merged typescript.typescriptPath when tsgo is enabled, warns and returns early if the selected package is unavailable, and adds Playwright tests plus test fixtures exercising tsgo diagnostics and issue exclusion.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title directly and concisely describes the main feature being added: TypeScript Go type checking support.
Description check	✅ Passed	The description clearly explains the purpose of the PR: adding experimental TypeScript Go support with conditional path resolution, which aligns with the actual changes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch david/feat-tsgo-support

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@README.md`:
- Around line 122-124: The snippet uses an undeclared identifier tsgo when
setting typescriptPath; update the example so the default is a concrete,
copy-pasteable path and only use tsgo conditionally. Change the expression
around typescriptPath to use a safe check (e.g., test typeof tsgo !==
'undefined' or use a ternary that falls back to require.resolve('typescript'))
so typescriptPath resolves via require.resolve('typescript') by default and only
resolves `@typescript/native-preview` when tsgo is actually present.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: f8cc3c9a-bac0-4184-a5af-f284342962b5

📥 Commits

Reviewing files that changed from the base of the PR and between ea0ff7c and 8c6971e.

⛔ Files ignored due to path filters (1)

• pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml

📒 Files selected for processing (7)

• README.md
• package.json
• pnpm-workspace.yaml
• src/index.ts
• test/typescript-go/index.test.ts
• test/typescript-go/src/index.ts
• test/typescript-go/tsconfig.json

[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@src/index.ts`:
- Around line 148-158: The current equality check on
mergedOptions.typescript.typescriptPath can overwrite a user-provided value if
it happens to equal projectTypescriptPath/projectTsgoPath; instead, track origin
of the default path with a sentinel and only swap when the path is the
plugin-provided default. Modify the code that initially sets the default path to
record a flag/marker on mergedOptions.typescript (e.g.,
typescript.__isDefaultPath or typescript.__defaultPathOrigin) and then change
the conditional in the block that references
mergedOptions.typescript.typescriptPath to check that sentinel (and
mergedOptions.typescript exists) rather than comparing string equality against
projectTypescriptPath/projectTsgoPath; only perform the tsgo vs project swap
when the sentinel indicates the value came from the plugin default.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: fad54dce-08a7-491a-bf9a-7f228d76ee2c

📥 Commits

Reviewing files that changed from the base of the PR and between 8c6971e and 7316b1b.

📒 Files selected for processing (4)

• README.md
• pnpm-workspace.yaml
• src/index.ts
• test/typescript-go/index.test.ts

💤 Files with no reviewable changes (1)

• test/typescript-go/index.test.ts

✅ Files skipped from review due to trivial changes (1)

• README.md

🚧 Files skipped from review as they are similar to previous changes (1)

• pnpm-workspace.yaml