fix(exec): terminate process tree on timeout

pkg/tools/shell_process_windows.go

@@ -0,0 +1,27 @@
+//go:build windows
+
+package tools
+
+import (
+	"os/exec"
+	"strconv"
+)
+
+func prepareCommandForTermination(cmd *exec.Cmd) {
+	// no-op on Windows
+}
+
+func terminateProcessTree(cmd *exec.Cmd) error {
+	if cmd == nil || cmd.Process == nil {
+		return nil
+	}
+
+	pid := cmd.Process.Pid
+	if pid <= 0 {
+		return nil
+	}
+
+	_ = exec.Command("taskkill", "/T", "/F", "/PID", strconv.Itoa(pid)).Run()
+	_ = cmd.Process.Kill()
+	return nil
+}