Add repository hygiene, CI workflow, test scaffolding, pre-commit hooks, and comprehensive contributor documentation#15

Copilot wants to merge 2 commits intomainAreteDriver/TLS-Concept-production-2.0:mainfrom

copilot/implement-repository-hygiene-ciAreteDriver/TLS-Concept-production-2.0:copilot/implement-repository-hygiene-ciCopy head branch name to clipboard