docs(recipes): Community Recipe Book for Common Macro-Task Workflows

[sdageltc]

Summary & Motivation

To help developers understand the full power of deterministic verification, Contract DAGs, and autonomous supervision, we want to create a curated recipes/ directory with practical, real-world examples.

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Proposed Recipes

1. recipes/01-legacy-codebase-refactor/:
   • Setting up contract acceptance checks (pytest, ruff, coverage) to refactor legacy Python modules without behavioral regression.
2. recipes/02-fastapi-crud-generator/:
   • Decomposing an API feature into Schema -> Models -> Endpoints -> Integration Tests.
3. recipes/03-offline-local-llm-loop/:
   • End-to-end tutorial running letitloop with Ollama (qwen2.5-coder) using zero cloud keys.
4. recipes/04-multi-agent-qc-audit/:
   • Configuring multi-lens quality gates (Spec Reviewer + Security Auditor + Performance Lens) with machine-verifiable evidence generation.

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Acceptance Criteria

• Each recipe contains a README.md with step-by-step instructions and runnable goal.json / CLI commands.
• All recipes are tested and verified working against the latest letitloop release.