chore: import upstream snapshot with attribution

dotnet/samples/Demos/OllamaFunctionCalling/Plugins/MyTimePlugin.cs

@@ -0,0 +1,16 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using System;
+using System.ComponentModel;
+using Microsoft.SemanticKernel;
+
+namespace OllamaFunctionCalling;
+
+/// <summary>
+/// Simple plugin that just returns the time.
+/// </summary>
+public class MyTimePlugin
+{
+    [KernelFunction, Description("Get the current time")]
+    public DateTimeOffset Time() => DateTimeOffset.Now;
+}