selfdocumenting code

Learn to build self-documenting Bash scripts that never let docs drift: add a parseable '#%' header as the source of truth, wire it to --help, auto-generate man pages with help2man, and use AI (local via Ollama or cloud via llm) to refresh headers from code. Includes install steps, a gen-help tool, a pre-commit hook for format/lint/docs, and Make targets to keep help, man pages, and README in sync.