feat: add folder creation date and sorting functionality in Vault components

src/handlers/folders.ts

@@ -21,6 +21,7 @@ function folderToResponse(folder: Folder): FolderResponse {
     id: folder.id,
     name: folder.name,
     revisionDate: folder.updatedAt,
+    creationDate: folder.createdAt,
     object: 'folder',
   };
 }

src/handlers/sync.ts

@@ -93,6 +93,7 @@ export async function handleSync(request: Request, env: Env, userId: string): Pr
       id: folder.id,
       name: folder.name,
       revisionDate: folder.updatedAt,
+      creationDate: folder.createdAt,
       object: 'folder',
     });
   }