- New chapter 05-clojure-nim.md (EN + BG) covering:
- Native compilation pipeline (Clojure → Nim → C → binary)
- AI-powered development (error explanation, code generation)
- JSON REPL for AI agents
- loop/recur with real TCO
- Cross-compilation: JS, shared libs, WASM
- Persistent data structures (HAMT)
- Concurrency: atoms, agents, channels
- Updated book README.md with Clojure/Nim focus
- Added Clojure/Nim terms to subject indices (EN + BG)
- Removed books/ from .gitignore so it can be pushed to GitLab