chore(i18n): improve recursive toggle button labels for clarity (#875)

Update translations for sidebar recursive toggle from 'Search subfolders'
to 'Include subfolders' / 'Current folder only' across all 10 languages.

This better describes the actual functionality - controlling whether
models/recipes from subfolders are included in the current view.

Related to #875

locales/zh-TW.json

@@ -839,8 +839,8 @@
         "unpinSidebar": "取消固定側邊欄",
         "switchToListView": "切換至列表檢視",
         "switchToTreeView": "切換到樹狀檢視",
-        "recursiveOn": "搜尋子資料夾",
-        "recursiveOff": "僅搜尋目前資料夾",
+        "recursiveOn": "包含子資料夾",
+        "recursiveOff": "僅目前資料夾",
         "recursiveUnavailable": "遞迴搜尋僅能在樹狀檢視中使用",
         "collapseAllDisabled": "列表檢視下不可用",
         "dragDrop": {