Mark

Added
- Included additional files in the project for `templates/default_system_prompt.md`.

Changed
- Updated default system prompt and refactored into the templates directory.

Added
- Returned a pretty error if no `OPENAI_API_KEY` is found.

Fixed
- Fixed stdin use case.

Added
- Added local file references to page links.

Added
- Utilized LangChain image utilities for local image encoding.

Added
- Bumped version.
- Added new dependencies: `langchain ^0.2.1` and `langchain-community ^0.2.1`.