* Fix test to consider no-longer deprecated elements.

* Cleanup some comments and introduce a helper to check if the configuration is HTML5.
* Allow b, i, u and s tags in HTML 5 as they are not obsolete in HTML 5 (and i is in fact frequently used for icons).
* Add XWikiHTML5TagProvider to fix svg and style tag handling.
* Fix class fan-out complexity in DefaultHTMLCleaner by not using the CleanerTransformations class but only our subclass.

* Fix SonarLint blocker by copying the parent tests instead of calling them.

  * also catch IllegalArgumentException since Tomcat might throw them
    when trying to resolve a bad path

  * Ensure to normalize URLs when calling ServletEnvironment#getResource

* Fix case of HTML5 doctype, see https://github.com/whatwg/html/blob/main/FAQ.md#what-is-the-doctype-for-modern-html-documents

* Document another exception in BodyFilter
* Improve robustness in HTML version parameter parsing

* Code style
Co-authored-by: Marius Dumitru Florea <marius@xwiki.com>

* Add a new HTML_VERSION parameter to HTMLCleanerConfiguration.
* Pass the HTML version in DefaultHTMLCleaner to HTMLCleaner and set the document type accordingly.
* Add a tag transformation to transform `<tt>` to `<span class="monospace">`.
* Add a tag transformation to replace the font filter in HTML5 as the cleaner removes the font tags too early otherwise.
* Extend BodyFilter to allow more HTML5 tags directly in the body.
* Add constants for many HTML5 tags in HTMLConstants.
* Add a new unit test HTML5HTMLCleanerTest to test the behavior of HTMLCleaner with the HTML5 configuration.
* Modify DefaultHTMLCleanerTest to allow re-using most test methods in HTML5HTMLCleanerTest.

XCOMMONS-2137: Possible IllegalArgumentException when performing a merge

  * Style improvments

XCOMMONS-2137: Possible IllegalArgumentException when performing a merge

  * Fix sonar quality gate

XCOMMONS-2068: Possible OutOfBoundsException when performing diff
XCOMMONS-2137: Possible IllegalArgumentException when performing a merge

This changes provides new integration tests that helped investigating
the problems in the diff algorithm. Basically the main issue was in the
creation of conflicts information: all subsequent errors are most likely
coming from there.
The changes here are mostly about computing a proper index for extract
conflict information, and actually enforcing proper usage of sublist API
to avoid problems: this might displays some loggers if other problems
occurs in the algorithm, but this would not break the caller.