feat: update Node.js version and dependencies, use rolldown, enhance configurations, fix lint issues

[mumenthalers]

No description provided.

[Copilot]

Pull request overview

This PR modernizes the action’s toolchain by bumping the Node.js baseline to v24, migrating the build output from ncc to rolldown, and introducing updated formatting/linting/commit tooling aligned with newer ESLint + TypeScript conventions.

Changes:

• Update runtime/tooling to Node.js 24 (engines, action runtime, CI workflow, TS target).
• Replace ncc build with rolldown and add/refresh repo-wide Prettier, ESLint (flat config), lint-staged, and commitlint configs.
• Fix lint/type issues by tightening TS annotations and adjusting execution style (top-level await).

Reviewed changes

Copilot reviewed 18 out of 21 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
tsconfig.json	Updates TS target to ES2024 and normalizes exclude formatting.
src/lab.ts	Adds top-level await and tightens typing for URL param / Octokit response.
src/index.ts	Adds top-level await, adds lint suppression for GitHub payload access, tightens fetch param types.
prettier.config.js	Introduces JS-based (ESM) Prettier configuration.
package.json	Updates Node engine, deps, and switches build script to rolldown; adds CI format/lint scripts.
lint-staged.config.js	Adds lint-staged configuration for formatting/linting staged files.
eslint.config.js	Migrates to ESLint flat config with type-aware TypeScript rules.
commitlint.config.js	Adds commitlint JS config.
action.yml	Bumps action runtime to node24.
README.md	Reformats workflow/docs content and updates development section formatting.
.prettierrc.yml	Removes legacy Prettier YAML config in favor of JS config.
.prettierignore	Ignores dist for formatting.
.nvmrc	Updates local Node version to 24.
.npmrc	Disables funding prompts.
.lintstagedrc.yml	Removes legacy lint-staged YAML config in favor of JS config.
.husky/pre-commit	Converts pre-commit hook to multi-line script and keeps building dist.
.github/workflows/test.yml	Updates CI to use .nvmrc, adds formatting and linting checks, pins actions by SHA.
.eslintrc.yml	Removes legacy ESLint YAML config in favor of flat config.
.commitlintrc.yml	Removes legacy commitlint YAML config in favor of JS config.

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