Description of the feature request:

I propose adding a new notebook (Smart_Contract_Auditing.ipynb) to demonstrate Gemini's application in blockchain security. The guide covers explaining complex code, auditing for vulnerabilities (Reentrancy), gas optimization, and refactoring using Solidity-specific logic.

What problem are you trying to solve with this feature?

The cookbook currently lacks examples for Web3. This notebook fills that gap by demonstrating how developers can leverage Gemini's reasoning capabilities for automated smart contract auditing, enabling CI/CD integration for Web3.

Any other information you'd like to share?

I have the notebook tested and ready, opening a pr shortly.
If the maintainers are interested in expanding the repo's coverage of Web3/Blockchain use cases, I would be happy to contribute further examples in this domain.
Thanks for considering!