Mark samples as AOT compatible (#184)

* Revert changes to remove APIs

* Apply suggestions from code review

Co-authored-by: Stephen Toub <stoub@microsoft.com>

---------

Co-authored-by: Stephen Toub <stoub@microsoft.com>

samples/AspNetCoreSseServer/Program.cs

@@ -1,5 +1,10 @@
+using TestServerWithHosting.Tools;
+
 var builder = WebApplication.CreateBuilder(args);
-builder.Services.AddMcpServer().WithToolsFromAssembly();
+builder.Services.AddMcpServer()
+    .WithTools<EchoTool>()
+    .WithTools<SampleLlmTool>();
+
 var app = builder.Build();
 
 app.MapMcp();