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

benchmarks/run_benchmarks.sh

@@ -5,7 +5,7 @@ SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
 
 echo "=============================================="
-echo "  Clojure/Nim vs JVM Clojure — Benchmarks"
+echo "  Bara Lang vs JVM Clojure — Benchmarks"
 echo "=============================================="
 echo ""
 
@@ -17,8 +17,8 @@ run_bench() {
   echo "--- $name ---"
   echo ""
   
-  # Clojure/Nim
-  echo "  [Clojure/Nim]"
+  # Bara Lang
+  echo "  [Bara Lang]"
   local nim_total=0
   local nim_times=()
   for ((i=1; i<=runs; i++)); do
@@ -58,7 +58,7 @@ run_bench() {
     
     if [ $jvm_avg -gt 0 ]; then
       local speedup=$((jvm_avg / nim_avg))
-      echo "  => Clojure/Nim is ${speedup}x FASTER (avg)"
+      echo "  => Bara Lang is ${speedup}x FASTER (avg)"
     fi
   else
     echo "  [JVM Clojure] — not installed, skipping"
@@ -66,7 +66,7 @@ run_bench() {
   echo ""
 }
 
-echo "Building Clojure/Nim..."
+echo "Building Bara Lang..."
 nim c -o:"$PROJECT_DIR/cljnim" "$PROJECT_DIR/src/cljnim.nim" 2>/dev/null
 echo ""