Add TraceKind static class

Author: matarillo

LanguageServer/Parameters/General/InitializeParams.cs

@@ -35,6 +35,10 @@ public class InitializeParams
         /// <remarks>
         /// If omitted trace is disabled ('off').
         /// </remarks>
+        /// <value>
+        /// See <see cref="LanguageServer.Parameters.TraceKind"/> for an enumeration of standardized kinds.
+        /// </value>
+        /// <seealso cref="LanguageServer.Parameters.TraceKind"/>
         public string trace { get; set; }
     }
 }

LanguageServer/Parameters/TraceKind.cs

@@ -0,0 +1,24 @@
+namespace LanguageServer.Parameters
+{
+    /// <summary>
+    /// For <c>initialize</c>
+    /// </summary>
+    /// <seealso cref="LanguageServer.Parameters.General.InitializeParams.trace"/>
+    public static class TraceKind
+    {
+        /// <summary>
+        /// trace is disabled.
+        /// </summary>
+        public const string Off = "off";
+
+        /// <summary>
+        /// trace is partially enabled.
+        /// </summary>
+        public const string Messages = "messages";
+
+        /// <summary>
+        /// trace is fully enabled.
+        /// </summary>
+        public const string Verbose = "verbose";
+    }
+}