* fix: Enhance stream error handling and parsing
This commit improves the robustness of stream processing in the llamacpp-extension.
- Adds explicit handling for 'error:' prefixed lines in the stream, parsing the contained JSON error and throwing an appropriate JavaScript Error.
- Centralizes JSON parsing of 'data:' and 'error:' lines, ensuring consistent error propagation by re-throwing parsing exceptions.
- Ensures the async iterator terminates correctly upon encountering stream errors or malformed JSON.
* Address bot comments and cleanup
8f1a36c8e3