Attempt to add HUD core

module/applications/sheets/base-item-sheet.mjs

@@ -94,7 +94,7 @@ export default class CthulhuEternalItemSheet extends HandlebarsApplicationMixin(
         dragover: this._onDragOver.bind(this),
         drop: this._onDrop.bind(this),
       }
-      return new DragDrop(d)
+      return new foundry.applications.ux.DragDrop.implementation(d)
     })
   }
 
@@ -141,14 +141,14 @@ export default class CthulhuEternalItemSheet extends HandlebarsApplicationMixin(
    * @param {DragEvent} event       The originating DragEvent
    * @protected
    */
-  _onDragOver(event) {}
+  _onDragOver(event) { }
 
   /**
    * Callback actions which occur when a dragged element is dropped on a target.
    * @param {DragEvent} event       The originating DragEvent
    * @protected
    */
-  async _onDrop(event) {}
+  async _onDrop(event) { }
 
   // #endregion