🗂️ 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.

---------

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

api/server/controllers/UserController.js

@@ -1,6 +1,8 @@
 const { logger, webSearchKeys } = require('@librechat/data-schemas');
 const { Tools, CacheKeys, Constants, FileSources } = require('librechat-data-provider');
 const {
+  getNewS3URL,
+  needsRefresh,
   MCPOAuthHandler,
   MCPTokenStorage,
   normalizeHttpError,
@@ -10,7 +12,6 @@ const { updateUserPluginAuth, deleteUserPluginAuth } = require('~/server/service
 const { verifyEmail, resendVerificationEmail } = require('~/server/services/AuthService');
 const { getMCPManager, getFlowStateManager, getMCPServersRegistry } = require('~/config');
 const { invalidateCachedTools } = require('~/server/services/Config/getCachedTools');
-const { needsRefresh, getNewS3URL } = require('~/server/services/Files/S3/crud');
 const { processDeleteRequest } = require('~/server/services/Files/process');
 const { getAppConfig } = require('~/server/services/Config');
 const { getLogStores } = require('~/cache');