feat/update-providers-readmes-and-examples

[RahmeKarim]

Note

Medium Risk
Adds new first-party framework adapters and tool-execution wrappers (including sync-to-async bridging), which could affect runtime behavior when executing tools in these frameworks. Most other changes are docs/examples and should be low risk.

Overview
Bumps the SDK to 2.3.2 and adds first-party connect() adapters exported as metorial_autogen, metorial_crewai, metorial_google_adk, and metorial_llamaindex, wiring them through connectors.py and the package __init__.

Introduces new framework integration modules for CrewAI, Google ADK, and LlamaIndex plus shared helpers in integrations/_common.py to standardize tool signatures, result normalization/serialization, and (for sync frameworks) safe execution on the session’s event loop.

Updates the top-level README and the examples/ tree with new runnable examples (AutoGen/CrewAI/Google ADK/LlamaIndex), per-example requirements.txt/.env.example files, and small consistency tweaks to existing examples and snippets.

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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Missing [openai] extra in autogen requirements

Medium Severity

The autogen-ext package requires the [openai] extra to provide OpenAIChatCompletionClient. The example imports from autogen_ext.models.openai import OpenAIChatCompletionClient, which will raise an ImportError at runtime because plain autogen-ext doesn't install the openai dependency. The requirement needs to be autogen-ext[openai].