feat: /autoplan — auto-review pipeline (v0.10.0.0) (#327)

* feat: /autoplan skill — auto-review pipeline with decision audit trail

Thin orchestrator that reads CEO, design, and eng review skills from disk
and runs them at full depth with auto-decisions using 6 encoded principles.
Surfaces taste decisions at a final approval gate.

* chore: wire /autoplan into routing, touchfiles, and validation tests

* chore: bump version and changelog (v0.10.0.0)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

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Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

SKILL.md

@@ -14,6 +14,7 @@ description: |
   - Reviewing a plan (strategy) → suggest /plan-ceo-review
   - Reviewing a plan (architecture) → suggest /plan-eng-review
   - Reviewing a plan (design) → suggest /plan-design-review
+  - Auto-reviewing a plan (all reviews at once) → suggest /autoplan
   - Creating a design system → suggest /design-consultation
   - Debugging errors → suggest /investigate
   - Testing the app → suggest /qa