Add AOT compatibility publish test (#1246)

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Co-authored-by: stephentoub <2642209+stephentoub@users.noreply.github.com>
Co-authored-by: Stephen Toub <stoub@microsoft.com>
Co-authored-by: eiriktsarpalis <2813363+eiriktsarpalis@users.noreply.github.com>

tests/ModelContextProtocol.AotCompatibility.TestApp/Program.cs

@@ -0,0 +1,36 @@
+using ModelContextProtocol.Client;
+using ModelContextProtocol.Protocol;
+using ModelContextProtocol.Server;
+using System.IO.Pipelines;
+
+Pipe clientToServerPipe = new(), serverToClientPipe = new();
+
+// Create a server using a stream-based transport over an in-memory pipe.
+await using McpServer server = McpServer.Create(
+    new StreamServerTransport(clientToServerPipe.Reader.AsStream(), serverToClientPipe.Writer.AsStream()),
+    new McpServerOptions()
+    {
+        ToolCollection = [McpServerTool.Create((string arg) => $"Echo: {arg}", new() { Name = "Echo" })]
+    });
+_ = server.RunAsync();
+
+// Connect a client using a stream-based transport over the same in-memory pipe.
+await using McpClient client = await McpClient.CreateAsync(
+    new StreamClientTransport(clientToServerPipe.Writer.AsStream(), serverToClientPipe.Reader.AsStream()));
+
+// List all tools.
+var tools = await client.ListToolsAsync();
+if (tools.Count == 0)
+{
+    throw new Exception("Expected at least one tool.");
+}
+
+// Invoke a tool.
+var echo = tools.First(t => t.Name == "Echo");
+var result = await echo.InvokeAsync(new() { ["arg"] = "Hello World" });
+if (result is null || !result.ToString()!.Contains("Echo: Hello World"))
+{
+    throw new Exception($"Unexpected result: {result}");
+}
+
+Console.WriteLine("Success!");