migrate to "export default"

also, set no-use-before-define in linter

src/backupsites.js

@@ -1,63 +1,25 @@
 import assert from 'node:assert';
-import * as backupFormats from './backupformats.js';
+import backupFormats from './backupformats.js';
 import BoxError from './boxerror.js';
 import constants from './constants.js';
-import * as cron from './cron.js';
+import cron from './cron.js';
 import { CronTime } from 'cron';
 import crypto from 'node:crypto';
-import * as database from './database.js';
+import database from './database.js';
 import debugModule from 'debug';
 import eventlog from './eventlog.js';
-import * as hush from './hush.js';
+import hush from './hush.js';
 import locks from './locks.js';
 import path from 'node:path';
 import paths from './paths.js';
 import safe from 'safetydance';
 import tasks from './tasks.js';
-import * as storageFilesystem from './storage/filesystem.js';
-import * as storageS3 from './storage/s3.js';
-import * as storageGcs from './storage/gcs.js';
+import storageFilesystem from './storage/filesystem.js';
+import storageS3 from './storage/s3.js';
+import storageGcs from './storage/gcs.js';
 
 const debug = debugModule('box:backups');
 
-export {
-    get,
-    list,
-    listByContentForUpdates,
-    add,
-    addDefault,
-    del,
-
-    setConfig,
-    setLimits,
-    setSchedule,
-    setRetention,
-    setEncryption,
-    setEnabledForUpdates,
-    setName,
-    setContents,
-
-    removePrivateFields,
-
-    startBackupTask,
-
-    startCleanupTask,
-
-    getSnapshotInfo,
-    setSnapshotInfo,
-
-    hasContent,
-
-    remount,
-    getStatus,
-    ensureMounted,
-
-    storageApi,
-
-    createPseudo,
-
-    reinitAll
-};
 
 // format: rsync or tgz
 // provider: used to determine the api provider
@@ -588,3 +550,42 @@ async function reinitAll() {
         safe(remount(site), { debug }); // background
     }
 }
+
+export default {
+    get,
+    list,
+    listByContentForUpdates,
+    add,
+    addDefault,
+    del,
+
+    setConfig,
+    setLimits,
+    setSchedule,
+    setRetention,
+    setEncryption,
+    setEnabledForUpdates,
+    setName,
+    setContents,
+
+    removePrivateFields,
+
+    startBackupTask,
+
+    startCleanupTask,
+
+    getSnapshotInfo,
+    setSnapshotInfo,
+
+    hasContent,
+
+    remount,
+    getStatus,
+    ensureMounted,
+
+    storageApi,
+
+    createPseudo,
+
+    reinitAll
+};