PR validation workflows: test / lint / typecheck

[ulises-jeremias]

Summary

Separate or composite workflows for pytest, ruff, pyright.

CNA mapping

CNA: test.yml, lint.yml, type-check.yml.

Acceptance criteria

• Triggers on push/PR to main (+ schedule optional)
• Uses uv for install (astral-sh/setup-uv)
• Badges documented for README

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

#7