chore: import upstream snapshot with attribution

dotnet/samples/Concepts/Plugins/ImportPluginFromGrpc.cs

@@ -0,0 +1,33 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using Microsoft.SemanticKernel;
+using Microsoft.SemanticKernel.Plugins.Grpc;
+
+namespace Plugins;
+
+// This example shows how to use gRPC plugins.
+public class ImportPluginFromGrpc(ITestOutputHelper output) : BaseTest(output)
+{
+    [Fact(Skip = "Setup crendentials")]
+    public async Task RunAsync()
+    {
+        Kernel kernel = new();
+
+        // Import a gRPC plugin using one of the following Kernel extension methods
+        // kernel.ImportGrpcPlugin
+        // kernel.ImportGrpcPluginFromDirectory
+        var plugin = kernel.ImportPluginFromGrpcFile("<path-to-.proto-file>", "<plugin-name>");
+
+        // Add arguments for required parameters, arguments for optional ones can be skipped.
+        var arguments = new KernelArguments
+        {
+            ["address"] = "<gRPC-server-address>",
+            ["payload"] = "<gRPC-request-message-as-json>"
+        };
+
+        // Run
+        var result = await kernel.InvokeAsync(plugin["<operation-name>"], arguments);
+
+        Console.WriteLine($"Plugin response: {result.GetValue<string>()}");
+    }
+}