impl Clone for rust crate

[DanielDK05]

I was just wondering if it would be possible to implement the Clone trait for the FastNoiseLite struct in the rust crate. Cloning is often very useful, and would be a nice to have, in my opinion. (Also I currently need it for my project :D)

[Auburn]

If you want to make a PR with the change I can look at merging it

[DanielDK05]

Sure, I'll look into that!

[DanielDK05]

Wasn't that much needed, heres the pull request:
#138