chore(infra): add type module and publint validation

[SoonIter]

Summary

• Add "type": "module" to package.json for proper ESM support
• Update export file extensions (.mjs → .js, .js → .cjs) to align with module type
• Add rsbuild-plugin-publint for package publishing validation
• Update repository URL to rstackjs org

Test plan

• Verify pnpm build succeeds with updated config
• Verify publint passes with no errors
• Verify both ESM and CJS consumers can import the package correctly

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly modernizes the package's module system by adopting ES Modules as the default, which improves compatibility and future-proofs the codebase. It also introduces automated validation for package publishing, a crucial step for maintaining high quality and preventing common distribution issues. These changes collectively enhance the package's maintainability and its readiness for broader adoption.

Highlights

• Module System Update: Configured the package.json to use ES Modules by setting "type": "module" and adjusted export paths to use .js for ESM and .cjs for CommonJS, ensuring modern module compatibility.
• Publishing Validation: Integrated rsbuild-plugin-publint into the build configuration to automatically validate package publishing, enhancing reliability and adherence to best practices.
• Repository URL Update: Updated the repository URL in package.json to reflect the new rstackjs organization, aligning with current project ownership.

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Changelog

• package.json
  • Added "type": "module" to declare the package as an ES Module.
  • Modified exports, main, and module fields to correctly point to .js for ESM and .cjs for CommonJS builds.
  • Updated the repository.url to the rstackjs organization.
  • Added rsbuild-plugin-publint to devDependencies.
• pnpm-lock.yaml
  • Updated lockfile to include rsbuild-plugin-publint and its transitive dependencies such as @publint/pack, mri, package-manager-detector, picocolors@1.1.1, publint, and sade.
• rslib.config.ts
  • Imported pluginPublint from rsbuild-plugin-publint.
  • Added pluginPublint() to the plugins array in the defineConfig call.

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[gemini-code-assist]

Code Review

This pull request transitions the package to an ES module by setting "type": "module" in package.json and updating file extensions in the exports map. It also adds rsbuild-plugin-publint for package validation. My feedback highlights a potential issue where the build configuration may not produce the .cjs file expected by the updated package.json, which could lead to resolution errors for CommonJS consumers.

[Copilot]

Pull request overview

This PR updates the package to publish as an ESM-first module ("type": "module"), adjusts exported entrypoints accordingly, and adds rsbuild-plugin-publint to validate the published package surface during builds.

Changes:

• Add "type": "module" and update exports/main/module paths to use .js (ESM) and .cjs (CJS).
• Add rsbuild-plugin-publint and wire it into rslib.config.ts.
• Update the repository URL and lockfile to reflect the new dependency graph.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 1 comment.

File	Description
rslib.config.ts	Adds rsbuild-plugin-publint to run publint during the rslib build.
package.json	Sets "type": "module", updates package entrypoints/extensions, and adds the publint plugin devDependency.
pnpm-lock.yaml	Locks rsbuild-plugin-publint and its transitive dependencies.

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

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