Issue templates (bug/feature/docs) + PR template

[ulises-jeremias]

Summary

Port YAML issue forms; rename CLI references to create-awesome-python-app.

CNA mapping

CNA: .github/ISSUE_TEMPLATE/*, PULL_REQUEST_TEMPLATE.md.

Acceptance criteria

• Bug/feature/docs templates live
• PR template with test plan checklist
• --info mentioned for bug env section

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

#8