- Introduced a new `Groups` field in the `Attachment` struct to support categorization of attachments.
- Integrated `types.MetaInfo` into `ManagerOption` for improved metadata handling.
- Added a local uploader for attachments, enabling file uploads from a specified local path.
- Updated asset management functions to reflect changes in file metadata and structure.
- Updated the API to include new upload options for handling different storage types: chat, knowledge, and assets.
- Improved group building logic for attachment uploads based on user, chat, and assistant IDs.
- Removed deprecated attachment files and refactored related code to streamline the attachment management process.
- Enhanced error handling for required fields in upload options, ensuring better validation and user feedback.
