Added 7 new documentation sections with code examples:
- Cyst: isolated reactive subtrees that survive parent re-renders
- Reactive expressions: auto-wrapping deref-containing exprs in computed
- Live island preview: paste defisland, get working reactive preview
- HyperSX: indentation-based alternative syntax viewer
- Inline test runner: browser-embedded test execution with pass/fail
- Test harness: three-layer test infrastructure (core/reactive/web)
- Core signals: spec-level reactive primitives, zero platform deps
Each section has code examples. The test runner section links to the
live temperature converter demo with 5/5 inline tests.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>