[MISC] initial Genesis Fuzz Support fuzz_target.py

[Shivam7-1]

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Introducing foundational fuzzing support for Genesis to help identify and resolve potential issues.

Once merged, I will submit a pull request to the OSS-Fuzz repo to enable fuzzing for this library on Google infrastructure. Any identified bugs will be reported to the Genesis maintainers.

Kindly review the OSS-Fuzz documentation and Bug Disclosure Guidelines before proceeding with the merge.

Thanks