fix: remove duplicate answer output (renderer owns all display)

The renderer prints FinalAnswer to stderr. The CLI's fmt.Println
to stdout was producing a second copy. Removed — the renderer is
now the sole output path for agent responses.

Author: jkyberneees

cmd/kode/main.go

@@ -170,7 +170,7 @@ func run(args []string) error {
 	if err != nil {
 		return err
 	}
-	fmt.Println(result)
+	_ = result // rendered by the loop engine via Renderer
 	return nil
 }