tooling: Scaffold repo with Makefile, npm hooks, and CI.

[nedseb]

Description

Set up the development tooling following the same patterns as micropython-steami-lib and arduino-steami-lib.

Tasks

• Add Makefile (lint, test, clean, deepclean, help)
• Add package.json (husky, commitlint, lint-staged, validate-branch-name)
• Add commitlint.config.js
• Add .husky/commit-msg and .husky/pre-commit
• Add .gitignore
• Add env.mk
• Add CONTRIBUTING.md
• Add README.md
• Add CI workflow: lint (ruff or flake8)
• Add CI workflow: check-commits (commitlint)
• Add requirements.txt or pyproject.toml with dependencies (Pillow, cairosvg, scikit-image)

Reference

• micropython-steami-lib Makefile and tooling as template

Parent

• feat: Scaffold repo and migrate simulation/validation tools. #1 — Migration umbrella issue