[FEATURE] Add support for AI21 via the `ai21` Python SDK

[dot-agi]

📥 Pull Request

📘 Description Adds support for the AI21 models (ai21 >= 2.0.0) via their Python SDK with examples.

🔄 Related Issue (if applicable) #372

🎯 Goal Extend the functionality of AgentOps to support AI21 models.

🔍 Additional Context AI21's Task-Specific Models has a Contextual Answer capability which is currently saved as an ActionEvent.

🧪 Testing Tested using the provided file.

[dot-agi]

@bboynton97 @siyangqiu @HowieG @areibman this is ready for review!

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[dot-agi]

@areibman @bboynton97 can you guys review this?

[areibman]

We'll need to update Tokencost with Jamba-instruct. The model name in our dictionary is `ai21.jamba-instruct-v1:0`. Will raise an issue on that PR.