- Introduced support for file attachments in test inputs using the `file://` protocol, allowing images, audio, and documents to be loaded and converted to appropriate formats.
- Updated `ParseInput` and related functions to handle file references, ensuring seamless integration of file content into messages.
- Enhanced error handling and path resolution for file loading, considering both relative paths and the `YAO_ROOT` environment variable.
- Expanded documentation to include examples of file attachments and their usage in test cases, improving clarity for users.
