feat(sol): UDP + HTTP listener

system/shutdown.go

@@ -0,0 +1,18 @@
+//go:build !windows
+// +build !windows
+
+package system
+
+import (
+	"log"
+	"os/exec"
+)
+
+// Shutdown shuts down the system (Unix/Linux/macOS)
+func Shutdown() {
+	cmd := exec.Command("shutdown", "-h", "now")
+
+	if err := cmd.Run(); err != nil {
+		log.Fatalf("Failed to shutdown system: %v", err)
+	}
+}