Adds jest, ts-jest, ts-node, and @types/jest as devDependencies and creates
jest.config.ts with the ts-jest preset. `npm test` exits 0 with no test files.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add express as a dependency and @types/express as a devDependency.
Create empty src/index.ts; tsc --noEmit passes cleanly.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>