docs: document script generation patterns and update test count

update: prompts for realistic human-like Claude Code tutorials

chore: add tutorials/ and traces/ to .gitignore

update: prompts to support session chaining and richer validation output

feat: replace validator subprocess with Deep Agent + LocalShellBackend

docs: add README.md and CLAUDE.md

Merge branch 'worktree-agent-a9681ea8' into feat/tutorial-gen

fix: add missing tests, deduplicate _extract_script utility

fix: critical bugs — reducer annotations, --limit wiring, import cleanup, env sanitization

feat: add test suite with 20 tests covering all components

feat: add CLI entry point with run, status, and list commands

feat: assemble StateGraph with supervisor-subagent routing

feat: add all subagents, nodes, and prompt templates

feat: add core state models and SQLite tracking database

feat: scaffold tutorial-gen project structure