Support for SHAKE128

[MatthiasRoels]

First of all, it would really say thank you for creating and publishing this plugin! As of this week, I have started to become a heavy user (running 100x daily batch jobs in production using Sha2 and Sha3 hashing expr).

We would like to further extend our use by replacing a piece of pandas code relying on https://docs.python.org/3/library/hashlib.html#hashlib.shake_128 in an apply. The hash we build is used downstream so we cannot easily change it. So for now, we plan to move the pandas code to Polars using map_elements to keep on using the same hashing function. However, it would be nice if this plugin can support that hash functionality too.

If permitted, I would really like a shot of implementing this myself (it has been a long-time personal goal to contribute to a Rust project/Polars plugin).

[ion-elgreco]

Yes, feel free to make a PR to add this feature! :) I see Sha3 crate, which we already depend on supports this: https://docs.rs/sha3/latest/sha3/type.Shake128.html