Extend progress notification support (#163)

* Extend progress notification support

* Address feedback and fix test

---------

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

src/ModelContextProtocol/Protocol/Types/ListResourceTemplatesRequestParams.cs

@@ -4,12 +4,4 @@
 /// Sent from the client to request a list of resource templates the server has.
 /// <see href="https://github.com/modelcontextprotocol/specification/blob/main/schema/">See the schema for details</see>
 /// </summary>
-public class ListResourceTemplatesRequestParams
-{
-    /// <summary>
-    /// An opaque token representing the current pagination position.
-    /// If provided, the server should return results starting after this cursor.
-    /// </summary>
-    [System.Text.Json.Serialization.JsonPropertyName("cursor")]
-    public string? Cursor { get; init; }
-}
+public class ListResourceTemplatesRequestParams : PaginatedRequestParams;