v1.9.0 - Guided Setup Wizard

Closes #13 as re-scoped: a thin interactive layer over the existing install/project-init flow rather than a parallel implementation.

Added

• install.sh --wizard — interactive setup: asks what kind of project you're installing into, then lets you choose the Stop-hook automation level (none / Auto-Loop / Auto-Loop + Evolving-Loop) and whether to enable the changelog + pre-write safety hooks, instead of always wiring the fixed defaults. Agents and skills are still installed in full either way — the wizard only changes which hooks get merged into settings.local.json. Requires a TTY; falls back to the historical defaults under curl | bash or any other non-interactive stdin. Documented in README, MIGRATION.md, and /getting-started.
• tests/test-install-wizard.sh — 7 tests covering all three automation levels, declining observability hooks, blank-answer defaults, and the non-interactive fallback path, plus a regression check that plain ./install.sh still merges every hook exactly as before.

Fixed

• agents/skill-synthesizer.md was missing the <example> block the v1.8.1 changelog claimed all 14 agent descriptions had.
• Top-level VERSION file was stale at 1.7.2 (unread by any script, out of sync with .claude-plugin/plugin.json / marketplace.json since the v1.7.2 release) — synced to 1.9.0.

Full Changelog: v1.8.1...v1.9.0