Tag Collaborator role as obsolete to follow official deprecation notice.

But wait to get more information on the new project permissions system before doing more.

Author: mnivet

SharpBucket/V2/Pocos/WorkspaceRole.cs

@@ -1,5 +1,7 @@
 namespace SharpBucket.V2.Pocos
 {
+    using System;
+
     /// <summary>
     /// Enumeration of the possible roles (or permission level) that a user can have on a workspace.
     /// </summary>
@@ -8,6 +10,7 @@ public enum WorkspaceRole
         /// <summary>
         /// User has write access to at least one repository in the workspace.
         /// </summary>
+        [Obsolete("Deprecation notice - Removing Collaborator role in Bitbucket Cloud API on 1 June 2022. See https://developer.atlassian.com/cloud/bitbucket/deprecation-notice-collaborator-role/")]
         Collaborator,
 
         /// <summary>