This commit refactors the `create_conversation` function in `simplemind/__init__.py` to use a more descriptive variable name (`conv`) for the conversation object. It also updates the `add_plugin` method to use the new variable name (`conv`) instead of `conversation`.
In `simplemind/models.py`, the `prepend_system_message` method now accepts an optional `meta` parameter. The method also adds a system message to the conversation by prepending it to the list of messages.
Additionally, the `add_message` method in `simplemind/models.py` has been modified to include type annotations and a default value for the `role` parameter. The method now requires the `text` parameter to be provided explicitly.
A new test file, `tests/test_conversations.py`, has been added to the repository. This file contains a test case for the `generate_data` function, which tests the functionality of different LLM providers.
Lastly, the test files `tests/test_generate_data.py` and `tests/test_generate_text.py` have been modified to remove the unused `Amazon` provider from the list of test cases.
Luciano
kennethreitz