🗂️ 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/services/Files/strategies.js

@@ -1,6 +1,13 @@
 const { FileSources } = require('librechat-data-provider');
 const {
+  getS3URL,
+  saveURLToS3,
   parseDocument,
+  uploadFileToS3,
+  S3ImageService,
+  saveBufferToS3,
+  getS3FileStream,
+  deleteFileFromS3,
   uploadMistralOCR,
   uploadAzureMistralOCR,
   uploadGoogleVertexMistralOCR,
@@ -27,17 +34,18 @@ const {
   processLocalAvatar,
   getLocalFileStream,
 } = require('./Local');
-const {
-  getS3URL,
-  saveURLToS3,
-  saveBufferToS3,
-  getS3FileStream,
-  uploadImageToS3,
-  prepareImageURLS3,
-  deleteFileFromS3,
-  processS3Avatar,
-  uploadFileToS3,
-} = require('./S3');
+const { resizeImageBuffer } = require('./images/resize');
+const { updateUser, updateFile } = require('~/models');
+
+const s3ImageService = new S3ImageService({
+  resizeImageBuffer,
+  updateUser,
+  updateFile,
+});
+
+const uploadImageToS3 = (params) => s3ImageService.uploadImageToS3(params);
+const prepareImageURLS3 = (_req, file) => s3ImageService.prepareImageURL(file);
+const processS3Avatar = (params) => s3ImageService.processAvatar(params);
 const {
   saveBufferToAzure,
   saveURLToAzure,