Add groundwork to Documentation & Security

[choiyounggi]

Adds groundwork — a safe-by-default Claude Code harness starter pack — to Documentation & Security.

• Real use case: guardrails block destructive commands (rm -rf, force-push, DROP/TRUNCATE, kubectl delete, secret access) even when permission prompts are off, with a redacted audit log.
• Tested: ships with a BATS self-test suite (/guardrails:self-test).
• Not a duplicate: unlike the scanner/guidance plugins already listed, it enforces at command-execution time (PreToolUse hooks), and also bundles a wiki-grounded dev loop and a memory lifecycle.

Repo: https://github.com/choiyounggi/groundwork — MIT, local-only, no API key.