[Epic 7] Docs & community health files

[ulises-jeremias]

Summary

Port CONTRIBUTING, SECURITY, CoC, templates, CODEOWNERS, docs/*.

CNA mapping

Root + .github/* community files + docs/*.md.

Why

Same contributor experience and governance as CNA.

Sub-issues

• CONTRIBUTING.md adapted for uv / Typer / PyPI #53 CONTRIBUTING.md adapted for uv / Typer / PyPI
• SECURITY.md + CODE_OF_CONDUCT + FUNDING + CODEOWNERS #54 SECURITY.md + CODE_OF_CONDUCT + FUNDING + CODEOWNERS
• Issue templates (bug/feature/docs) + PR template #55 Issue templates (bug/feature/docs) + PR template
• docs/: BRAND, DISTRIBUTION_SETUP, TROUBLESHOOTING, MIGRATION, ADR uv monorepo #56 docs/: BRAND, DISTRIBUTION_SETUP, TROUBLESHOOTING, MIGRATION, ADR uv monorepo
• Root README badges strategy (PyPI / CI / coverage) #57 Root README badges strategy (PyPI / CI / coverage)

Blocks / dependencies

none

Blocked by: none (can proceed in parallel with M0)

Reference

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