Improve badge for click tracking and links

[miqh]

Hello,

These changes aim to address the improvements suggested in #173.

I'm aware n_clicks_timestamp wasn't requested, but I figure I'd include it for consistency since most other components supporting n_clicks also has the former.

I transplanted the documentation for the new prop types from existing component implementations.

I've also introduced (couldn't find an existing one) a test file for the badge component that covers the new behaviour introduced.

[tcbegley]

Hey @miqh

Thanks so much for your contribution! Particularly for adding tests. I've somewhat neglected these to date as I've invested most of my time into improving documentation instead 😳 I definitely want to improve the state of the testing now that I'm mostly done with the docs for now.

I've made a couple of minor inline comments, really just for making this component consistent with other components that do similar things, specifically Button and DropdownMenuItem, and which I think helps readability a bit. If you are able to incorporate those I'd be happy to merge and include in the next release.

Thanks again for taking the time to contribute!

[tcbegley]

This is great, thanks again for your contribution!