v5.2.0

Added

• review-pr skill: New PR review skill with 4-dimension code review (hallucination, architecture, performance, test validity) and severity-graded PR comments via gh.

Removed

• 10 unused CLI tools: docs-to-voice, render-katex, render-error-book, extract-pdf-text, generate-storyboard-images, enforce-video-aspect-ratio, sync-memory-index, extract-conversations, filter-logs, search-logs — tool packages, tests, registration, and documentation references cleaned up.

Changed

• CodeGraph CLI refactored: Replaced monolithic command modules with focused smaller commands. Run apltk codegraph --help for the current command surface.
• Documentation: Added "--help first" guidance across all docs.