kata-ctl: Implement Display trait for GuestProtection enum

Implement Display for enum to display in env output.

Signed-off-by: Archana Shinde <archana.m.shinde@intel.com>

src/tools/kata-ctl/src/check.rs

@@ -8,6 +8,7 @@
 use anyhow::{anyhow, Result};
 use reqwest::header::{CONTENT_TYPE, USER_AGENT};
 use serde::{Deserialize, Serialize};
+use std::fmt;
 use thiserror::Error;
 
 #[cfg(any(target_arch = "x86_64"))]
@@ -147,6 +148,19 @@ pub enum GuestProtection {
     Se,
 }
 
+impl fmt::Display for GuestProtection {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            GuestProtection::Tdx => write!(f, "tdx"),
+            GuestProtection::Sev => write!(f, "sev"),
+            GuestProtection::Snp => write!(f, "snp"),
+            GuestProtection::Pef => write!(f, "pef"),
+            GuestProtection::Se => write!(f, "se"),
+            GuestProtection::NoProtection => write!(f, "none"),
+        }
+    }
+}
+
 #[allow(dead_code)]
 #[derive(Error, Debug)]
 pub enum ProtectionError {