Feature: add csl entry content as title (tooltip)

[harleylara]

Hi @timlrx , First of all I really love this plugin, thank you for its creation 😁

I have the idea that It would be awesome to add the content of the csl-entry as a tooltip (title) to each citation. If I position the mouse over the citation (whether it is a link or not) I can visualize the content of it.

Sometime like this:

Note: this is the result of a 50 line plugin that I build on top of it, but I thought it would be better to include this functionality directly in this plugin, what do you think about it?.

[timlrx]

Checkout the new tooltip feature - https://rehype-citation.netlify.app/tooltips. It was slightly more complicated than I initially imagined since the entry could potentially be dependent on the preceding bibliography entries. I have also allowed the user to specify an attribute if they don't want to use title for it. This makes it easy to style it with CSS as in the linked example.