Five v0.9 — Harbour + Go fusion language

- Compiler: PP → Lexer → Parser → Analyzer → Gengo pipeline
- Parser: 232/236 (98%) Harbour compatibility, registry-based dispatch
- RTL: 351 Harbour-compatible functions
- RDD: DBF/NTX/CDX engines with Rushmore bitmap optimization
- Go Interop: IMPORT + pkg.Func() + obj:Method() with FastPath (15M calls/sec)
- HB_FUNC API: Full Harbour C API compatible Go bridge
- Concurrency: SPAWN/LAUNCH/GOROUTINE, <-, WATCH, PARALLEL FOR, ASYNC/AWAIT
- Extensions: Multi-return, DEFER, Slice, f-string, Nil-safe ?:, CONST
- Macro Compiler: Runtime AST parsing and evaluation
- Debugger: TUI debugger with source display, breakpoints, stepping
- FRB: Native + Pcode dual mode runtime binary
- Tests: 13 packages ALL PASS

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

examples/go_strings.prg

@@ -0,0 +1,60 @@
+// Five: Go strings 패키지를 PRG에서 자유롭게 사용
+
+IMPORT "strings"
+
+PROCEDURE Main()
+   LOCAL cText, aParts, cUpper, cResult
+   LOCAL lFound, nCount, nPos, i
+   LOCAL cJoined, cTrimmed, cReplaced
+
+   cText := "Hello,World,Five,Go,Harbour"
+
+   // Split → Harbour 배열로 자동 변환
+   aParts := strings.Split(cText, ",")
+   ? "Split 결과:", Len(aParts), "개"
+   FOR i := 1 TO Len(aParts)
+      ? "  [" + Str(i, 1) + "]", aParts[i]
+   NEXT
+   ?
+
+   // Store results in separate variables
+   cUpper   := strings.ToUpper(cText)
+   lFound   := strings.Contains(cText, "Five")
+   nCount   := strings.Count(cText, ",")
+   nPos     := strings.Index(cText, "Go")
+
+   ? "원본:    ", cText
+   ? "ToUpper: ", cUpper
+   ? "Contains 'Five':", lFound
+   ? "쉼표 갯수:", nCount
+   ? "'Go' 위치:", nPos
+   ?
+
+   // 조합해서 사용
+   cJoined   := strings.Join(aParts, " | ")
+   cTrimmed  := strings.TrimSpace("  hello  ")
+   cReplaced := strings.ReplaceAll(cText, ",", " → ")
+
+   ? "Join:    ", cJoined
+   ? "Trim:    [" + cTrimmed + "]"
+   ? "Replace: ", cReplaced
+   ?
+
+   // 조건 분기에서 활용
+   IF strings.HasPrefix(cText, "Hello")
+      ? "Hello로 시작합니다"
+   ENDIF
+
+   IF strings.HasSuffix(cText, "Harbour")
+      ? "Harbour로 끝납니다"
+   ENDIF
+
+   // 루프에서 활용
+   ? "대문자로 시작하는 단어:"
+   FOR i := 1 TO Len(aParts)
+      IF strings.ToUpper(Left(aParts[i], 1)) == Left(aParts[i], 1)
+         ? "  ", aParts[i]
+      ENDIF
+   NEXT
+
+   RETURN