Improve error handling in makeLocalGnarkZkOperator function

[adithyaakrishna]

The makeLocalGnarkZkOperator function in gnark.ts could benefit from improved error handling to provide more informative messages to users.

Tasks:

1. Replace the generic console.log statement with a more specific error message.
2. Consider creating a custom error type for Gnark-related errors.
3. Ensure that the error message includes information about supported platforms.
4. Add a try-catch block around the initGnark function call to handle potential errors during initialization.
5. Update the return statement to provide a more informative error when Gnark is not supported.

Improving error handling will help users better understand and troubleshoot issues when working with Gnark in different environments.

Contributors: Please note that by submitting a pull request, you are agreeing to accept and sign the Contributor License Agreement (CLA) found at https://github.com/reclaimprotocol/.github/blob/main/CLA.md

[vanshdhar999]

Can you assign me this issue to me? Would very much like to work on this problem.

[aniket7r]

Hi, @adithyaakrishna , I would like to work on this issue.