feat(pipeline): ship InDesign pipeline agent, skill, CLI, and docs

[PAMulligan]

Summary

Ships the InDesign pipeline as a first-class Aurelius workflow — the user-facing surface (#67) over the parser (#63), PDF ingestion (#64), token mapper (#65), and component generator (#66). This is the closing sub-issue of epic #62.

What's included

Agent — .claude/agents/indesign-to-react.md

Orchestrates the pipeline (validate → parse → map → generate → review → commit), reads the generation report and proposes concrete follow-ups (unmapped frames, font fallbacks, missing alt text, semantic-tag refinements), and is non-destructive (feature branch, never main). Referenced from the agent catalog.

Skill — .claude/skills/indesign-conversion/SKILL.md

When-to-use, prerequisites (exported IDML/PDF), expected outputs, common gotchas (CMYK→sRGB shifts, missing fonts, oversized print images, accessibility gaps), and a runnable worked example against the committed fixture.

CLI — aurelius pipeline indesign

aurelius pipeline indesign brochure.pdf --target react --styling tailwind --output ./src/indesign

• --target next|vite|astro|react, --styling tailwind|css-modules, --output <dir>, --json
• Honors aurelius.config.json (indesign section); flags win
• Writes components + stories + barrel + tokens + extracted assets, and emits both a Markdown and a machine-readable JSON report

Documentation

• docs/pipelines/indesign.md — exporting from InDesign (IDML & PDF), output, fidelity expectations, accessibility checklist, troubleshooting — linked from the README docs index
• README Pipelines section now lists InDesign alongside Figma and Canva
• Counts bumped to 56 agents / 23 skills across all enforced docs; CLAUDE.md catalog + command reference updated

Fixture + CI smoke

• Committed tests/fixtures/indesign/sample.idml (binary, .gitattributes/.prettierignore handled)
• An end-to-end smoke test runs the full aurelius pipeline indesign flow against the committed fixture and asserts the generated project builds (strict tsc) and renders (Storybook smoke ≈ react-dom/server). It runs in the existing pipeline-tests CI job.

Acceptance criteria (#67)

• agents/indesign-to-react.md exists, matches the agent shape, referenced from the agent index
• skills/indesign-conversion/SKILL.md exists with a runnable example
• aurelius pipeline indesign --help prints documented usage
• docs/pipelines/indesign.md published and linked from the docs index
• README's Pipelines section lists InDesign
• End-to-end CI smoke against the committed fixture asserts the generated project builds + passes a Storybook (render) smoke

Testing

• pnpm --filter @aurelius/pipeline typecheck / test / build ✅ — 133 tests (5 new)
• Repo-wide eslint . (0 errors), prettier --check ., and check-doc-counts (56 agents / 23 skills) ✅; lockfile unchanged
• Verified the compiled aurelius bin generates a project from the committed fixture

Note on the CI "agent" smoke

A Claude Code agent can't execute in headless CI, so the end-to-end smoke runs the pipeline the agent drives (runPipelineCli) against the committed fixture and verifies build + render — the faithful, deterministic equivalent.

Closes #67
Closes #62

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