Add CI/CD for npm publishing and GitHub Pages deployment

[Copilot]

Automates package publishing to npm and demo site deployment to GitHub Pages.

Workflows

• publish-npm.yml: Publishes @minigames-react/minesweeper on release creation or manual trigger

  • Uses NPM_TOKEN secret for authentication
  • Includes --access public --no-git-checks flags for scoped package publishing

• deploy-pages.yml: Deploys demo site on main branch pushes

  • Sets GITHUB_PAGES=true env var to configure correct base path
  • Uses GitHub Actions deployment (not branch-based)

Configuration Changes

• vite.config.ts: Dynamic base path - /minigames-react/ for GitHub Pages, ./ for local
• package.json: Added repository metadata and MIT license
• Added .nojekyll to prevent Jekyll processing

Required Setup

See DEPLOYMENT.md for complete instructions:

1. npm: Add NPM_TOKEN secret with Automation token from npmjs.com
2. GitHub Pages: Set Source to "GitHub Actions" in Settings → Pages

Demo will be at: https://pubg.github.io/minigames-react/

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💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.