Hi Docsy maintainers!

We've received a request from some of the users of our Docsy site https://axway-open-docs.netlify.app/ to have "Copy" buttons on our code samples.

I see that Hugo doesn't support this out of the box, but it seems possible with the addition of some Javascript when I do a google search. For example, https://aaronluna.dev/blog/add-copy-button-to-code-blocks-hugo-chroma/

Is this something you would consider adding to the Docsy theme? I'd be happy to help with a PR if i can but I am no JS developer :)