Mark external links

[kellertuer]

Thanks again for this great package. I use it very often, since as soon as one manages e.g. an API package, it is really nice to be able to link back to the API for further details.

While reading the docs I noticed that it might be nice if one can distinguish internal and external links.
Would it maybe be possible to provide a prefix for external links – either within or directly before a link?
Similarly one could also use a postfix of course.

I for example use something like

[📖 a link](wikipedia-url)

in my docs whenever I link to wikipedia. One could add a similar option to add an emoji upfront to indicate external links – or even separate emojis for the separate external pages one links to?

The most advanced idea would be to use tven the other (external) packages icons, if for example they have fav-icons specified in their docs.