Logging Capability (#53)

* Logging Capability

* Readability

* Redundant using

---------

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

src/ModelContextProtocol/Protocol/Types/SetLevelRequestParams.cs

@@ -0,0 +1,17 @@
+using System.Text.Json.Serialization;
+
+namespace ModelContextProtocol.Protocol.Types;
+
+/// <summary>
+/// A request from the client to the server, to enable or adjust logging.
+/// <see href="https://github.com/modelcontextprotocol/specification/blob/main/schema/2024-11-05/schema.json">See the schema for details</see>
+/// </summary>
+public class SetLevelRequestParams
+{
+    /// <summary>
+    /// The level of logging that the client wants to receive from the server. 
+    /// The server should send all logs at this level and higher (i.e., more severe) to the client as notifications/message.
+    /// </summary>
+    [JsonPropertyName("level")]
+    public required LoggingLevel Level { get; init; }
+}