2.6Package Management

Tool	Lock File	Speed	Best For
npm	package-lock.json	Standard	Default choice, comes with Node.js
yarn	yarn.lock	Fast	Monorepos, workspaces
pnpm	pnpm-lock.yaml	Fastest	Disk-efficient, strict dependency resolution

# Initialize and install
npm init -y
npm install --save-dev jest @types/jest ts-jest typescript
npm install --save-dev @playwright/test
npm install --save-dev cypress