Fix compliance of CanvasID file

Grasshopper_Engine/Query/CanvasID.cs

@@ -1,16 +1,43 @@
-using System;
+/*
+ * This file is part of the Buildings and Habitats object Model (BHoM)
+ * Copyright (c) 2015 - 2022, the respective contributors. All rights reserved.
+ *
+ * Each contributor holds copyright over their respective contributions.
+ * The project versioning (Git) records all such contribution source information.
+ *                                           
+ *                                                                              
+ * The BHoM is free software: you can redistribute it and/or modify         
+ * it under the terms of the GNU Lesser General Public License as published by  
+ * the Free Software Foundation, either version 3.0 of the License, or          
+ * (at your option) any later version.                                          
+ *                                                                              
+ * The BHoM is distributed in the hope that it will be useful,              
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 
+ * GNU Lesser General Public License for more details.                          
+ *                                                                            
+ * You should have received a copy of the GNU Lesser General Public License     
+ * along with this code. If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.      
+ */
+
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
 using GH = Grasshopper;
 using Grasshopper.Kernel;
+using System.ComponentModel;
+using BH.oM.Base.Attributes;
 
 namespace BH.Engine.Grasshopper
 {
     public static partial class Query
     {
+        [Description("Gets a unique ID for a Grasshopper document based on the runtime ID of the document linked to a GUID. Valid only for the active session and will not be the same across sessions. Reloading Grasshopper will produce new IDs for the same files on a new load. This is predominantly used for Analytics.")]
+        [Input("document", "A Grasshopper document to obtain a unique GUID from for the given runtime ID.")]
+        [Output("canvasID", "A GUID set as a string to uniquely identify the session instance of the canvas.")]
         public static string CanvasID(this GH_Document document)
         {
             if (document == null)