docs: highlight unique advantages — standalone, HAMT, multi-target

Update README and architecture docs to emphasize:
- Complete independence from Java ecosystem (JVM, GraalVM, Closure)
- Native HAMT persistent data structures built from scratch in Nim
- Multi-target compilation (native, shared lib, WASM, JS)
- AI-native tooling and concurrency without JVM threads

Updates both English and Bulgarian documentation.

docs/en/index.md

@@ -1,36 +1,38 @@
-
-[← Back to Index](index.md)
-
----
-
-# Clojure/Nim Documentation (English)
+# Clojure/Nim Documentation
 
 > A Clojure dialect that compiles to Nim → C → native binaries.
+> **The only standalone Clojure implementation completely free from the Java ecosystem.**
 
-## Table of Contents
+## Choose Language / Избор на език
 
-| # | Document | Description |
-|---|----------|-------------|
-| 01 | [Getting Started](01-getting-started.md) | Installation, build, CLI commands, quick examples |
-| 02 | [Architecture](02-architecture.md) | Compiler pipeline, design decisions, internal structure |
-| 03 | [AI Integration](03-ai-integration.md) | DeepSeek, OpenAI, MiMo — error assistance, code generation, optimization, debugging |
-| 04 | [API Reference](04-api-reference.md) | JSON REPL protocol, operations, tool-call format |
-| 05 | [User Guide](05-user-guide.md) | Macros, threading, interop, advanced patterns |
-| 06 | [Roadmap](06-roadmap.md) | Completed phases, future plans, performance targets |
+| 🇬🇧 English | 🇧🇬 Български |
+|------------|-------------|
+| [English Documentation](en/index.md) | [Българска Документация](bg/index.md) |
 
-## Quick Start
+## Quick Links
 
-```bash
-git clone https://gitlab.com/balvatar/lisp-nim.git
-cd lisp-nim
-make build
-make check        # build + tests + examples
-./cljnim repl     # human REPL
-```
+- **GitHub/GitLab:** [lisp-nim](https://gitlab.com/balvatar/lisp-nim)
+- **Build:** `make build && make check`
+- **Tests:** 276+ tests across 8 test suites
+- **AI Integration:** DeepSeek API, OpenAI-compatible, Xiaomi MiMo
 
-## Stats
+## Why Clojure/Nim?
 
-- **Tests:** 276+ across 8 suites
-- **Compiler:** Nim → C → native
-- **Targets:** Linux, macOS, Windows, JS, WASM, C shared libraries
-- **AI Support:** DeepSeek API, OpenAI-compatible, Xiaomi MiMo
+Unlike every other Clojure dialect, Clojure/Nim has **zero dependency on the Java ecosystem** — no JVM, no GraalVM, no Google Closure Compiler, no Java standard library.
+
+| Dialect | Java Ecosystem Dependency |
+|---------|---------------------------|
+| Clojure (JVM) | Full — runs on JVM |
+| ClojureScript | Heavy — Google Closure Compiler |
+| Babashka | Medium — GraalVM native-image |
+| **Clojure/Nim** | **None — completely standalone** |
+
+### Unique Advantages
+
+1. **Native HAMT Persistent Data Structures** — Built from scratch in Nim (Persistent Vector, Map, Set with structural sharing)
+2. **Multiple Targets** — Native binary, shared library (.so/.dll), WASM, and JavaScript from one codebase
+3. **AOT Compiler** — Clojure → Nim → C → native, running at C speed
+4. **Nim/C Interop** — Direct FFI without JVM bridging overhead
+5. **AI-Native Tooling** — Built-in AI integration for code generation, optimization, and debugging
+6. **Concurrency Without JVM** — Atoms, Agents, and core.async channels without Java threads
+7. **Tiny Binaries** — Single executables under 1MB with no runtime dependencies