Update content according to latest spec (#513)

* Update content according to latest spec

* Add Title to a bunch of types

* Add _meta to lots of types

* Address feedback, more cleanup, fix NAOT test failure

src/ModelContextProtocol.Core/Server/McpServerResourceCreateOptions.cs

@@ -48,6 +48,11 @@ public sealed class McpServerResourceCreateOptions
     /// </remarks>
     public string? Name { get; set; }
 
+    /// <summary>
+    /// Gets or sets the title to use for the <see cref="McpServerPrompt"/>.
+    /// </summary>
+    public string? Title { get; set; }
+
     /// <summary>
     /// Gets or set the description to use for the <see cref="McpServerResource"/>.
     /// </summary>
@@ -87,6 +92,7 @@ public sealed class McpServerResourceCreateOptions
             Services = Services,
             UriTemplate = UriTemplate,
             Name = Name,
+            Title = Title,
             Description = Description,
             MimeType = MimeType,
             SerializerOptions = SerializerOptions,