Implement List operations for KubectlGet

Add List<T> and ListAsync<T> methods to Kubectl and AsyncKubectl classes
that support:
- Listing namespaced and cluster-scoped resources
- Label selector filtering (e.g., "app=test,tier=frontend")
- Field selector filtering (e.g., "metadata.name=my-pod")
- Pagination with limit and continue token

Also update GenericClient.ListAsync and ListNamespacedAsync to pass
through the filtering parameters to the underlying CustomObjects API.

Co-authored-by: brendandburns <5751682+brendandburns@users.noreply.github.com>

Author: Copilot

src/KubernetesClient.Kubectl/Beta/AsyncKubectl.List.cs

@@ -0,0 +1,32 @@
+namespace k8s.kubectl.beta;
+
+public partial class AsyncKubectl
+{
+    /// <summary>
+    /// List Kubernetes resources of a specific type.
+    /// </summary>
+    /// <typeparam name="T">The type of Kubernetes resource list to get (e.g., V1PodList).</typeparam>
+    /// <param name="namespace">The namespace to list resources from. If null, lists cluster-scoped resources or resources across all namespaces for namespaced resources.</param>
+    /// <param name="labelSelector">A selector to restrict the list of returned objects by their labels. Defaults to everything.</param>
+    /// <param name="fieldSelector">A selector to restrict the list of returned objects by their fields. Defaults to everything.</param>
+    /// <param name="limit">Maximum number of responses to return for a list call.</param>
+    /// <param name="continueToken">The continue option should be set when retrieving more results from the server.</param>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>The list of requested resources.</returns>
+    public async Task<T> ListAsync<T>(
+        string? @namespace = null,
+        string? labelSelector = null,
+        string? fieldSelector = null,
+        int? limit = null,
+        string? continueToken = null,
+        CancellationToken cancellationToken = default)
+        where T : IKubernetesObject
+    {
+        var metadata = typeof(T).GetKubernetesTypeMetadata();
+        using var genericClient = new GenericClient(client, metadata.Group, metadata.ApiVersion, metadata.PluralName, disposeClient: false);
+
+        return @namespace != null
+            ? await genericClient.ListNamespacedAsync<T>(@namespace, labelSelector, fieldSelector, limit, continueToken, cancellationToken).ConfigureAwait(false)
+            : await genericClient.ListAsync<T>(labelSelector, fieldSelector, limit, continueToken, cancellationToken).ConfigureAwait(false);
+    }
+}

src/KubernetesClient.Kubectl/Beta/Kubectl.List.cs

@@ -0,0 +1,25 @@
+namespace k8s.kubectl.beta;
+
+public partial class Kubectl
+{
+    /// <summary>
+    /// List Kubernetes resources of a specific type.
+    /// </summary>
+    /// <typeparam name="T">The type of Kubernetes resource list to get (e.g., V1PodList).</typeparam>
+    /// <param name="namespace">The namespace to list resources from. If null, lists cluster-scoped resources or resources across all namespaces for namespaced resources.</param>
+    /// <param name="labelSelector">A selector to restrict the list of returned objects by their labels. Defaults to everything.</param>
+    /// <param name="fieldSelector">A selector to restrict the list of returned objects by their fields. Defaults to everything.</param>
+    /// <param name="limit">Maximum number of responses to return for a list call.</param>
+    /// <param name="continueToken">The continue option should be set when retrieving more results from the server.</param>
+    /// <returns>The list of requested resources.</returns>
+    public T List<T>(
+        string? @namespace = null,
+        string? labelSelector = null,
+        string? fieldSelector = null,
+        int? limit = null,
+        string? continueToken = null)
+        where T : IKubernetesObject
+    {
+        return client.ListAsync<T>(@namespace, labelSelector, fieldSelector, limit, continueToken).GetAwaiter().GetResult();
+    }
+}

src/KubernetesClient/GenericClient.cs

@@ -42,17 +42,17 @@ public async Task<T> CreateNamespacedAsync<T>(T obj, string ns, CancellationToke
             return resp.Body;
         }
 
-        public async Task<T> ListAsync<T>(CancellationToken cancel = default)
+        public async Task<T> ListAsync<T>(string labelSelector = null, string fieldSelector = null, int? limit = null, string continueToken = null, CancellationToken cancel = default)
         where T : IKubernetesObject
         {
-            var resp = await kubernetes.CustomObjects.ListClusterCustomObjectWithHttpMessagesAsync<T>(group, version, plural, cancellationToken: cancel).ConfigureAwait(false);
+            var resp = await kubernetes.CustomObjects.ListClusterCustomObjectWithHttpMessagesAsync<T>(group, version, plural, labelSelector: labelSelector, fieldSelector: fieldSelector, limit: limit, continueParameter: continueToken, cancellationToken: cancel).ConfigureAwait(false);
             return resp.Body;
         }
 
-        public async Task<T> ListNamespacedAsync<T>(string ns, CancellationToken cancel = default)
+        public async Task<T> ListNamespacedAsync<T>(string ns, string labelSelector = null, string fieldSelector = null, int? limit = null, string continueToken = null, CancellationToken cancel = default)
         where T : IKubernetesObject
         {
-            var resp = await kubernetes.CustomObjects.ListNamespacedCustomObjectWithHttpMessagesAsync<T>(group, version, ns, plural, cancellationToken: cancel).ConfigureAwait(false);
+            var resp = await kubernetes.CustomObjects.ListNamespacedCustomObjectWithHttpMessagesAsync<T>(group, version, ns, plural, labelSelector: labelSelector, fieldSelector: fieldSelector, limit: limit, continueParameter: continueToken, cancellationToken: cancel).ConfigureAwait(false);
             return resp.Body;
         }