Stub packages: create-python-app-core + create-awesome-python-app

[ulises-jeremias]

Summary

Add hatchling/src-layout stubs for both packages so workspace resolves.

CNA mapping

CNA: packages/create-node-app-core + packages/create-awesome-node-app.

Acceptance criteria

• packages/create-python-app-core/pyproject.toml exists
• packages/create-awesome-python-app/pyproject.toml exists with console script placeholder
• Core is a workspace dependency of the CLI package
• uv lock produces a single root lockfile

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

#2