Proposal: Add minimal CI workflow and test scaffold

[iceman2026]

Proposal: Add minimal CI workflow and test scaffold\n\nSummary:\n- Add that runs on and and performs: checkout, set up Node/Python if relevant, run tests when a test command exists ( / ============================= test session starts ==============================
platform linux -- Python 3.12.1, pytest-9.0.1, pluggy-1.6.0
rootdir: /workspaces/Downonthecorner
plugins: anyio-4.11.0
collected 0 items

============================ no tests ran in 0.00s =============================), and optionally run lints.\n- Add a lightweight test scaffold only after approval (e.g., example for Node or ============================= test session starts ==============================
platform linux -- Python 3.12.1, pytest-9.0.1, pluggy-1.6.0
rootdir: /workspaces/Downonthecorner
plugins: anyio-4.11.0
collected 0 items

============================ no tests ran in 0.00s ============================= example for Python) with a single smoke test.\n\nWhy:\n- Ensures PRs are validated, lowers barrier for contributors, and provides a reproducible check before merging.\n\nVerification:\n- Workflow passes on PR that adds a minimal test.\n- Local verification commands (examples): or .\n\nQuestions for maintainers:\n- Which language(s) should we target first (Node, Python, other)?\n- Should the first PR include both the workflow and a sample test, or only the workflow?\n\nIf you'd like, I can open a small PR adding a simple plus one sample test for your preferred language once you confirm the choice.