Fix error in OS windows.

Changed the progressbar to the pipe protocol.

src/helper/prepare_background_command_windows.go

@@ -0,0 +1,13 @@
+//go:build windows
+// +build windows
+
+package helper
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+func PrepareBackgroundCommand(cmd *exec.Cmd) {
+	cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}
+}