PyPI latest-version check

[ulises-jeremias]

Summary

Fetch latest version from PyPI; warn or fail under strict mode.

CNA mapping

CNA: checkForLatestVersion against npm registry.

Acceptance criteria

• Query PyPI JSON API for create-awesome-python-app
• Graceful failure when offline
• Integrates with CPA_STRICT_VERSION

Blocked by

none

Blocks

none

Reference

Parity matrix (workspace): knowledge/create-python-app-parity-matrix.md
Reference repo: https://github.com/Create-Node-App/create-node-app

Parent epic

#4