chore: rebrand Clojure/Nim → Bara Lang across codebase

- Bulk replace Clojure/Nim → Bara Lang in src/, lib/, examples/, benchmarks/,
  experiments/, books/, LICENSE, cljnim.nimble, PLAN.md, AI_AGENT.md
- Rename book chapters: 05-clojure-nim.md → 05-bara-lang.md (en + bg)
- Update all chapter index links and anchors
- Replace project-specific 'Clojure' references with 'Bara Lang' in
  experiments/, src/ai_assist.nim, src/tui_screens.nim, src/emitter.nim,
  src/reader.nim, src/types.nim, lib/cljnim_runtime*.nim
- Keep legitimate JVM Clojure/ClojureScript/Clojure CLR references intact

examples/ai_tools.clj

@@ -1,10 +1,10 @@
 ; AI-Native Tooling Demo
-; File and Git operations from Clojure
+; File and Git operations from Bara Lang
 
 (println "=== File Operations ===")
 
 ; Write a file
-(file/write "/tmp/ai_demo.txt" "Hello from Clojure/Nim AI!")
+(file/write "/tmp/ai_demo.txt" "Hello from Bara Lang AI!")
 
 ; Read it back
 (println (file/read "/tmp/ai_demo.txt"))

examples/ffi.clj

@@ -1,4 +1,4 @@
-; C FFI — Достъп до C функции директно от Clojure
+; C FFI — Достъп до C функции директно от Bara Lang
 ; (c-fn sin "math.h" :double [:double])
 ; Това генерира Nim proc с {.importc.} pragma
 

examples/hello.clj

@@ -1,3 +1,3 @@
-; First Clojure/Nim program
+; First Bara Lang program
 (println "Hello, Nim world!")
 (println (+ 1 2 3))

examples/jsonista.clj

@@ -1,10 +1,10 @@
-; jsonista.clj — Production JSON library example for Clojure/Nim
+; jsonista.clj — Production JSON library example for Bara Lang
 ; Modeled after https://github.com/metosin/jsonista
 ; Replaces Java/Jackson dependencies with native Nim JSON performance
 ;
 ; This example demonstrates:
 ;   - Fast JSON encoding/decoding without JVM overhead
-;   - Keyword keys support (Clojure idiomatic)
+;   - Keyword keys support (Bara Lang idiomatic)
 ;   - File I/O
 ;   - Pretty printing
 ;   - Complex nested data structures

examples/jsonista.md

@@ -1,4 +1,4 @@
-# jsonista.clj — Production JSON библиотека за Clojure/Nim
+# jsonista.clj — Production JSON библиотека за Bara Lang
 
 > Моделирана след [metosin/jsonista](https://github.com/metosin/jsonista), но с **нула Java зависимости**.
 
@@ -6,7 +6,7 @@
 
 Този пример демонстрира пълноценна JSON библиотека с API идентично на jsonista, но:
 
-| | JVM jsonista | Clojure/Nim jsonista |
+| | JVM jsonista | Bara Lang jsonista |
 |---|---|---|
 | JVM зависимост | ✅ Required (JVM + Jackson) | ❌ Няма |
 | Jackson/databind | ✅ Required | ❌ Няма |
@@ -21,8 +21,8 @@
 ; Основни функции
 (json/write-value-as-string data)                ; -> JSON string
 (json/write-value-as-string data opts)           ; -> JSON string с опции
-(json/read-value json-string)                    ; -> Clojure data
-(json/read-value json-string opts)               ; -> Clojure data с опции
+(json/read-value json-string)                    ; -> Bara Lang data
+(json/read-value json-string opts)               ; -> Bara Lang data с опции
 (json/write-value-to-file path data)             ; -> записва във файл
 (json/write-value-to-file path data opts)        ; -> записва във файл
 (json/read-value-from-file path)                 ; -> чете от файл
@@ -86,7 +86,7 @@
 ```
 Clojure code
       ↓
-Clojure/Nim Compiler
+Bara Lang Compiler
       ↓
 Nim код + cljnim_runtime (std/json)
       ↓
@@ -127,7 +127,7 @@ make check
 
 ## Сравнение с оригиналния jsonista
 
-| Feature | JVM jsonista | Clojure/Nim |
+| Feature | JVM jsonista | Bara Lang |
 |---|---|---|
 | `write-value-as-string` | ✅ | ✅ |
 | `read-value` | ✅ | ✅ |
@@ -140,4 +140,4 @@ make check
 
 ---
 
-**Извод:** С Clojure/Nim получаваш същото production-ready JSON API, но без целия Java overhead — native бинарен файл, мигновен старт, и достъп до цялата Nim/C ecosystem.
+**Извод:** С Bara Lang получаваш същото production-ready JSON API, но без целия Java overhead — native бинарен файл, мигновен старт, и достъп до цялата Nim/C ecosystem.