refactor: enhance Program.cs with pod watch functionality and code cleanup

Author: lqlive

examples/clientset/Program.cs

@@ -12,15 +12,21 @@ private static async Task Main(string[] args)
             var config = KubernetesClientConfiguration.BuildConfigFromConfigFile();
             var client = new Kubernetes(config);
 
-            ClientSet clientSet = new ClientSet(client);
+            var clientSet = new ClientSet(client);
             var list = await clientSet.CoreV1.Pod.ListAsync("default").ConfigureAwait(false);
             foreach (var item in list)
             {
                 System.Console.WriteLine(item.Metadata.Name);
             }
 
-            var pod = await clientSet.CoreV1.Pod.GetAsync("test","default").ConfigureAwait(false);
+            var pod = await clientSet.CoreV1.Pod.GetAsync("test", "default").ConfigureAwait(false);
             System.Console.WriteLine(pod?.Metadata?.Name);
+
+            var watch = clientSet.CoreV1.Pod.WatchListAsync("default");
+            await foreach (var (_, item)in watch.ConfigureAwait(false))
+            {
+                System.Console.WriteLine(item.Metadata.Name);
+            }
         }
     }
 }