Kani

Improvements
- Updated dependencies to allow more recent versions
- The documentation now shows fully-qualified class names in reference sections
- Added `.copy_with` method to ChatMessage and FunctionCall to make updating chat history easier
- Various documentation updates

Improvements
- Added a warning in `Kani.chat_round` to use `Kani.full_round` when AI functions are defined
- Added examples in Google Colab
- Other documentation improvements

Fixes
- Fixed an issue where the ctransformers engine could overrun its context length (e.g. see https://github.com/zhudotexe/kani/actions/runs/6152842183/job/16695721588)

Improvements
- Made `chat_in_terminal` work in Google Colab, rather than having to use `await chat_in_terminal_async`

- HuggingFace Engine: Fixed an issue where completion message lengths were overreported by an amount equal to the prompt length.
- Other documentation improvements

Improvements
- Added `Kani.add_to_history`, a method that is called whenever kani adds a new message to the chat context
- `httpclient.BaseClient.request` now returns a `Response` to aid low-level implementation
- `.get()` and `.post()` are unchanged
- Add additional documentation about GPU support for local models
- Other documentation improvements

Improvements

- Engines: Added `Engine.function_token_reserve()` to dynamically reserve a number of tokens for a function list
- OpenAI: The OpenAIEngine now reads the `OPENAI_API_KEY` environment variable by default if no api key or client is specified
- Documentation improvements (polymorphism, mixins, extension packages)