- Added `media-library.php` configuration file for managing media uploads and conversions.
- Updated `filesystems.php` to set default visibility for AWS S3 storage.
- Implemented `FileUpload` component for handling file uploads with preview and error handling.
- Created `ImagePreviewModal` component for displaying image previews in a modal.
- Introduced `Attachment` UI components for better file attachment handling.
- Added `useFileUpload` hook to manage file upload state and logic.
- Implemented utility functions for uploading files to S3 with presigned URLs.
- Created API route for generating presigned URLs for file uploads.
