feat: add build flow specs for 9 languages/tools
flows/git.md — commit workflow
flows/go.md — build, vet, test, tidy
flows/php.md — pint, phpstan, pest, audit
flows/ts.md — tsc, eslint, test, build
flows/cpp.md — cmake configure, build, test
flows/py.md — venv, ruff, pytest
flows/docker.md — build, smoke test, compose
flows/npm.md — lint, test, build, publish
flows/release.md — tag, push, artefacts, downstream deps
Each flow is a reminder of the standard build sequence for that stack.
Co-Authored-By: Virgil <virgil@lethean.io>
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