Fixed autolink showing and added examples

[regrowler]

Hi Mike. I noticed a problem while working with urls like in the example below.
<https://blog.mikepenz.dev/>
Markdown url syntax
In the current solution, it shown with brackets. I made a fix for that.
In Intellij's markdown parser it's called autolink. But for urls like in the markdown syntax, it has CompositeASTNode with 3 children.
One of them contains an autolink that does not equal MarkdownElementTypes.AUTOLINK due to it having the isToken property = true.
So, I implemented search of target element by element type name instead of getting all the text.
Also, I noticed that such kind of links doesn't have underscores if i use SquigglyUnderlineSpanPainter.
I believe this happens because of unspecified color for span style while building the string for autolinks.
Also, I added some autolink examples for test markdown strings in app, app-desktop and app-wasm.

[mikepenz]

Thank you very much!