Update item data models

module/models/Item/CommonItemData.mjs

@@ -25,10 +25,26 @@ export class CommonItemData extends foundry.abstract.TypeDataModel {
 				integer: true,
 			}),
 			tier: new fields.StringField({
-				initial: `simple`,
+				initial: DOTDUNGEON.defaultItemTier,
 				nullable: false,
 				choices: DOTDUNGEON.itemTiers,
 			}),
+			location: new fields.StringField({
+				initial: null,
+				nullable: true,
+				/*
+				"equipped" = on player, actively having an effect (e.g. armour
+					is worn, weapon is held), not all items have an equipped state
+				"inventory" = on player, equivalent to being put in a backpack
+				"storage" = not on player at all, in a chest in their house or
+					smth, these items should be displayed in the storage tab
+				"transportation" = not on player, in some form of transportation,
+					these items should be hidden on the sheet and the items that
+					are on a transportation should be referenced by UUID in that
+					transportation item
+				*/
+				choices: ["equipped", "inventory", "storage", "transportation"],
+			}),
 		};
 	};
 };