Added Help Menu LInks

CHANGELOG.md

 
 * Preferences for Advanced Hierarchy View
 * Added API to AdvancedHierarchyView to add other Icons from component types
+* Help Menu links (github, documentation, openUPM)
 
 #### Changed
 

Editor/MenuItems.cs

         }
 
         #endregion
+
+        #region HELP
+
+        [MenuItem("Help/Gameplay Ingredients/Documentation")]
+        static void Help()
+        {
+            Application.OpenURL("https://peeweek.readthedocs.io/en/latest/gameplay-ingredients/");
+        }
+
+        [MenuItem("Help/Gameplay Ingredients/GitHub Repository (Issues and Releases)")]
+        static void GitHub()
+        {
+            Application.OpenURL("https://github.com/peeweek/net.peeweek.gameplay-ingredients/");
+        }
+
+        [MenuItem("Help/Gameplay Ingredients/OpenUPM page")]
+        static void OpenUPM()
+        {
+            Application.OpenURL("https://openupm.com/packages/net.peeweek.gameplay-ingredients/");
+        }
+
+
+        #endregion
     }
 }