chore: add Rslint

[chenjiahan]

This PR contains:

• bugfix
• feature
• refactor
• documentation
• other

Are tests included?

• yes (bugfixes and features will not be merged without tests)
• no

Breaking Changes?

• yes (breaking changes will not be merged unless absolutely necessary)
• no

List any relevant issue numbers:

N/A

Description

This PR replaces the repository ESLint lint entrypoint with Rslint. It adds rslint.config.ts, the @rslint/core dev dependency, a VS Code extension recommendation, and updates validation CI to run pnpm run lint. Historical any usage is left in place with a targeted Rslint rule override.

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[Copilot]

Pull request overview

This PR migrates the repo’s JavaScript/TypeScript linting setup from ESLint to Rslint, updating configuration, dependencies, and CI so linting runs via pnpm run lint.

Changes:

• Replace ESLint config/ignore/tsconfig files with a new rslint.config.ts.
• Update package.json scripts and devDependencies to use @rslint/core and remove ESLint/Husky/lint-staged related tooling.
• Update CI validation workflow and add a VS Code extension recommendation for Rslint.

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
tsconfig.eslint.json	Removed ESLint-specific TS project config.
test/.eslintrc.js	Removed test-local ESLint rule overrides.
rslint.config.ts	Added Rslint configuration and rule override for historical any usage.
pnpm-lock.yaml	Updated lockfile for Rslint dependency set and removal of ESLint-related deps.
package.json	Switched lint scripts/deps to Rslint; removed ESLint/Husky/lint-staged configs.
.vscode/extensions.json	Recommend Rslint + Prettier VS Code extensions.
.husky/pre-commit	Removed pre-commit hook that ran lint-staged.
.github/workflows/validate.yml	CI now runs pnpm run lint instead of pnpm lint:js.
.eslintrc.js	Removed root ESLint configuration.
.eslintignore	Removed ESLint ignore file.

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

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