Default to using Bun instead of Node.js.

• Use bun <file> instead of node <file> or ts-node <file>
• Use bun install instead of npm install or yarn install or pnpm install
• Use bun run <script> instead of npm run <script> or yarn run <script> or pnpm run <script>
• Use bunx <package> <command> instead of npx <package> <command>

Do NOT use bun test to run tests. Instead call bun run test - which will call the correct test command.