switch hto monorepo structure

backend/cmd/dms/utils.go

@@ -0,0 +1,14 @@
+package main
+
+import "os/exec"
+
+func commandExists(cmd string) bool {
+	_, err := exec.LookPath(cmd)
+	return err == nil
+}
+
+func isArchPackageInstalled(packageName string) bool {
+	cmd := exec.Command("pacman", "-Q", packageName)
+	err := cmd.Run()
+	return err == nil
+}