[Feat] OpenAI Assistants (Beta) Integration

[dot-agi]

📥 OpenAI Assistants (Beta) Integration

Closes #482. Adds support for the OpenAI Assistants API.

Supports the following APIs -

• Assistants
• Threads
• Messages
• Runs
• Run Steps

🗒️ Changelog

• Adds a new method _override_openai_assistants_beta to override beta methods. This is purely for maintenance purposes since the API is in beta.
• Adds an example notebook adapted from this OpenAI cookbook. Note that the code is outdated so the notebook version is from this PR.
• Adds examples docs page using the example notebook

⚠️ Caveats

• No LLM event(s) recorded since the API is using a different format than ChatML for prompting.
• Async support will need a custom event handler which is to be inherited from AssistantEventHandler and modified accordingly. An example is here.

[codecov]

Codecov Report

Attention: Patch coverage is 4.61538% with 62 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
agentops/llms/providers/openai.py	4.61%	62 Missing ⚠️

Flag	Coverage Δ
unittests	36.85% <4.61%> (-0.65%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
agentops/llms/tracker.py	23.36% <ø> (ø)
agentops/llms/providers/openai.py	10.57% <4.61%> (-3.32%)	⬇️

[areibman]

Nailed it! Let's merge