FEAT: add baseDataModel logic

module/data/item/base.mjs

@@ -5,6 +5,7 @@
  * @property {string} type - The system type that this data model represents.
  * @property {boolean} hasDescription - Indicates whether items of this type have description field
  * @property {boolean} isQuantifiable - Indicates whether items of this type have quantity field
+ * @property {Record<string,string>} embedded - Record of document names of pseudo-documents and the path to the collection
  */
 
 const fields = foundry.data.fields;
@@ -16,7 +17,8 @@ export default class BaseDataItem extends foundry.abstract.TypeDataModel {
       label: "Base Item",
       type: "base",
       hasDescription: false,
-      isQuantifiable: false
+      isQuantifiable: false,
+      embedded: {},
     };
   }