chore: add Rslint

[chenjiahan]

This PR adds Rslint as the repository lint entrypoint. It includes rslint.config.ts, the @rslint/core dev dependency, a VS Code extension recommendation, and a GitHub Actions lint workflow that runs pnpm run lint.

Validated locally with pnpm run lint.

[chatgpt-codex-connector]

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[Copilot]

Pull request overview

This PR introduces Rslint as the repository’s lint entrypoint, wiring it into local scripts and CI so contributors and pull requests can run a consistent lint command.

Changes:

• Add rslint.config.ts and install @rslint/core.
• Add lint / lint:write scripts and recommend the VS Code Rslint extension.
• Add a GitHub Actions workflow to run pnpm run lint on pushes/PRs.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
rslint.config.ts	Adds the Rslint configuration and a couple of rule overrides.
package.json	Adds lint scripts and the @rslint/core dev dependency.
pnpm-lock.yaml	Locks @rslint/core and its transitive dependencies.
.vscode/extensions.json	Recommends editor extensions for linting/formatting.
.github/workflows/lint.yml	Adds a CI job to run the lint script on PRs and main.

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

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