docs: add column on the true value of Rail Coding from the AI Auditor perspective

docs: explicitly state TypeScript and strict environments as prerequisites for reproducibility

docs: add index READMEs for devlogs

docs: add a column explaining the necessity of guardrails despite day 1 success

refactor: move devlog into docs directory

docs: add sanitized devlogs

docs: restructure Rail Coding playbook into distinct chapters and update README

docs: add detailed READMEs to major directories

Initial release of Rail Coding Playbook