set up some basic stuff in github actions

[kantord]

No description provided.

[Copilot]

Pull Request Overview

This PR sets up basic testing infrastructure and GitHub Actions workflows for the project, including Vitest configuration, testing dependencies, a sample test, and CI/CD workflows for running tests and security audits.

Key Changes

• Added Vitest configuration with React and TypeScript support using jsdom environment
• Added GitHub Actions workflows for automated testing and security audits on all branches
• Created a reusable composite action for consistent Node.js and pnpm setup across workflows

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
vitest.config.mts	New Vitest configuration with React plugin, TypeScript paths, and jsdom environment
package.json	Added test script, packageManager field, and testing dependencies (vitest, @testing-library/react, jsdom)
tests/page.test.tsx	Sample test for the Home page component using React Testing Library
.github/workflows/test.yml	CI workflow to run tests on push/PR to any branch
.github/workflows/npm-audit.yml	CI workflow to run pnpm security audit with moderate severity threshold
.github/actions/setup/action.yml	Reusable composite action for installing pnpm, Node.js, and project dependencies
pnpm-lock.yaml	Lock file updates reflecting new testing dependencies

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

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