Add Numbers to Inventory Items

Story Points: 1

# How?

Anyone can do this one if they wish. In Figma, on the main Inventory page, each item has a number in parenthesis in its name. All that needs to be done is using the itemTypesInterface's (since this is the main Inventory, not the SubInventory) itemIds array to find out how many children it has, and putting that number in the text field for the itemList. If you have any questions, let me (NavigSB) know!

找到 itemTypesInterface 及其 itemIds 陣列，以計算每個庫存項目的子項數量。更新 itemList 元件中的 text 欄位，以在括號中顯示數量。查看主要 Inventory 頁面的 Figma 設計，以符合視覺格式。

由索引模型根據 Issue 內容生成。