fix: indent sublists correctly

[finn-matti]

Fixes #60. This basically uses this fix but instead of doing it inside of turndown, we create DOM representation of the note already in yarle itself so we can use the function. Since we actually need to move nodes around, I don't see a way to use a rule for this.

I also added a test.

[finn-matti]

Sadly I can already tell, that this is not enough. It works for the provided test case but I found a note of mine, that for some reason has a different but related problem with indented lists. I'll attach it here:

buffer.enex.zip

Here the sublist portion looks like this:

<ul>
  <li>
    <div>Zurück:</div>
  </li>
  <li style="list-style: none">
    <ul>
      <li>
        <div>s</div>
      </li>
    </ul>
  </li>
  <li>
    <div>Weiter:</div>
  </li>
  <li style="list-style: none">
    <ul>
      <li>
        <div>s</div>
      </li>
    </ul>
  </li>
  <li>
    <div>Querverweise:</div>
  </li>
  <li style="list-style: none">
    <ul>
      <li>
        <div>s</div>
      </li>
    </ul>
  </li>
</ul>

This might be related to it being created/changed/looked at on the iOS app, but this seems like valid html, where ul are contained within li. Still the rendering as Markdown is not right.

[finn-matti]

Alright. Now valid HTML and valid ENML get parsed as they should!

[akosbalasko]

Wow man, it's cool! Thanks for raising this up, validation, resolving, packing etc etc, all in. Thank you very much your contribution, I really appreciate it!