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/functions.prg

@@ -0,0 +1,20 @@
+FUNCTION Double(n)
+   RETURN n * 2
+
+FUNCTION Add(a, b)
+   RETURN a + b
+
+FUNCTION Main()
+   LOCAL result
+
+   result := Double(21)
+   ? "Double(21) =", result
+
+   result := Add(10, 20)
+   ? "Add(10,20) =", result
+
+   result := Double(Add(3, 4))
+   ? "Double(Add(3,4)) =", result
+
+   ? "Done!"
+   RETURN NIL