docs: add photoreal wiki heroes to all pages Embed assets/hero-16x9.jpg on every page. Generated with Grok Build: Grok 4.5 · xAI Imagine (/imagine).
docs: expand LiquidCortex.jl wiki from Devin outline Rewrite Home and Overview; add Getting Started, architecture, API, infrastructure, testing, and glossary pages grounded in main@4e2698c. Attributed to Grok Build: Grok 4.5.