feat(core, structure) sheet list menu option (#6593)

* feat(structure): Rendering sheet list layout option in test-studio

* feat(structure): branching the rendering of different document list panes

* feat(structure): renaming of generic pane components

* feat(structure): fixing typing for new sheetList

* feat(structure): resolving a default export to named

* feat(structure): testing sheet view pane display logcic

* fix(structure): resolving testing for useStructureTool

packages/sanity/src/structure/panes/documentList/DocumentSheetListPane.tsx

@@ -138,7 +138,7 @@ export function DocumentSheetListPane(props: DocumentSheetListPaneProps) {
   }
 
   return (
-    <Box paddingX={3}>
+    <Box data-testid="document-sheet-list-pane" paddingX={3}>
       <Box paddingBottom={3}>
         <Text size={0} muted>
           {/* eslint-disable-next-line i18next/no-literal-string */}