Add aisuite support

[davidberenstein1957]

• support for aisuite
• basic integration tests based on examples/observers execution. We can consider extending this to stores but this would require a bit more mocking efforts.
• code cleaning

[cfahlgren1]

Pushed a tiny commit to fix comment for an example

[cfahlgren1]

Great job! Looks good.

[cfahlgren1]

I wonder since aisuite implements openai if we don't necessarily need this and_ can just show an example with

wrap_openai on aisuite client?

unless you think the alias is useful?

[davidberenstein1957]

@cfahlgren1 I assume it still routes the logic to other LLM providers and does some of the mappings to the OpenAI schema for us, so I would say it is nice to add. Similarly to litellm also, just to have the coverage in case people are already using either one of the frameworks.