🗂️ refactor: Migrate S3 Storage to TypeScript in packages/api (#11947)

* Migrate S3 storage module with unit and integration tests

  - Migrate S3 CRUD and image operations to packages/api/src/storage/s3/
  - Add S3ImageService class with dependency injection
  - Add unit tests using aws-sdk-client-mock
  - Add integration tests with real s3 bucket (condition presence of  AWS_TEST_BUCKET_NAME)

* AI Review Findings Fixes

* chore: tests and refactor S3 storage types

- Added mock implementations for the 'sharp' library in various test files to improve image processing testing.
- Updated type references in S3 storage files from MongoFile to TFile for consistency and type safety.
- Refactored S3 CRUD operations to ensure proper handling of file types and improve code clarity.
- Enhanced integration tests to validate S3 file operations and error handling more effectively.

* chore: rename test file

* Remove duplicate import of refreshS3Url

* chore: imports order

* fix: remove duplicate imports for S3 URL handling in UserController

* fix: remove duplicate import of refreshS3FileUrls in files.js

* test: Add mock implementations for 'sharp' and '@librechat/api' in UserController tests

- Introduced mock functions for the 'sharp' library to facilitate image processing tests, including metadata retrieval and buffer conversion.
- Enhanced mocking for '@librechat/api' to ensure consistent behavior in tests, particularly for the needsRefresh and getNewS3URL functions.

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Co-authored-by: Danny Avila <danny@librechat.ai>

api/server/routes/files/files.js

@@ -2,6 +2,7 @@ const fs = require('fs').promises;
 const express = require('express');
 const { EnvVar } = require('@librechat/agents');
 const { logger } = require('@librechat/data-schemas');
+const { refreshS3FileUrls } = require('@librechat/api');
 const {
   Time,
   isUUID,
@@ -25,7 +26,6 @@ const { getStrategyFunctions } = require('~/server/services/Files/strategies');
 const { getOpenAIClient } = require('~/server/controllers/assistants/helpers');
 const { checkPermission } = require('~/server/services/PermissionService');
 const { loadAuthValues } = require('~/server/services/Tools/credentials');
-const { refreshS3FileUrls } = require('~/server/services/Files/S3/crud');
 const { hasAccessToFilesViaAgent } = require('~/server/services/Files');
 const { cleanFileName } = require('~/server/utils/files');
 const { hasCapability } = require('~/server/middleware');