[pillaiajay31]

Remove the redundant production build before testing generated CommonJS TypeScript apps. Keep source type checking and tests through ts-node, and preserve the independent production build.

Update the CommonJS template for TypeScript 6 with explicit Node types and rootDir settings, remove the unused baseUrl, update generator assertions, and document test/build behavior.

Fixes #640.

Validation on Windows with Node.js v24.22.1 and TypeScript 6.0.3:

• Generated app: 4 tests passed; dist absent after tests; independent build succeeded and produced dist/app.js.
• Both TypeScript generator suites: 12 tests passed. All four template suites: 12 tests passed. Lint on the changed generator test passed.
• A deliberate source type error correctly stopped npm test with exit 2.
• npm run test and npm run benchmark --if-present returned exit 0, but the Windows test script stopped after xcopy without executing tests. No benchmark script is defined.
• Running the intended CLI suite directly exited 1: 202 passed, 15 failed, 7 skipped. Failures include Windows path separators and EBUSY errors removing temporary directories; coverage fell below the required 100%. Subsequent CLI TypeScript, CLI ESM, and tstyche commands were not reached. The watch relative-path failure also reproduces in the original validation checkout.

Checklist

• run npm run test && npm run benchmark --if-present
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct