Investigate if XSoup is still needed

[jnioche]

IIRC we use Xsoup to be able to run Xpath expressions on documents parsed with Jsoup.
Judging by https://jsoup.org/cookbook/extracting-data/xpath-syntax JSoup can handle XPath expression directly

[rzo1]

We are using non standard expression from XSoup which are not compliant with XPath 1.0 - if we want to migrate to JSoup only, we need to get rid of those additional function like tidyText().