* Fix initialization to handle core Syntax Provider components

* Fix bug about the wrong Type being used
* Register more syntaxes to the syntax registry
* Removed more usages of the old Syntax.* static syntaxes

* Replace more deprecation calls to Syntax.valueOf() with calls to the Syntax Registry

* Remove deprecated call

* Replace more deprecation calls to Syntax.valueOf() with calls to the Syntax Registry
* Convert test to JUnit5/Mockito

* Fix test

[misc] Only allow xwiki-rendering build to get dependencies/plugins from Maven Central and XWiki own snapshots

Currently translated at 20.0% (1 of 5 strings)

Translation: XWiki Rendering/Content Macro
Translate-URL: https://l10n.xwiki.org/projects/xwiki-rendering/content-macro/si/

* Put back sonar for xwiki-rendering

[Misc] Disable sonar temporarily (see also XCOMMONS-2120: Put back execution of sonar on commons/rendering/platform)

* Removed tabs

* Add EN translations (even if not absolutely required since the code defaults are already in EN), to show the way for other translations

  * Fix missing blank line in components.txt files

* updated parent version

* Fix some @since values
* Convert the archetype-resources module to junit5
* Fix javadoc
* Fix bug in the class used for the Initialized annotation
* Removed not needed "static" keywords in an interface

* Convert more tests

XCOMMONS-2094: xwiki-commons-xml cannot be used anymore without adding a custom repository in the settings.xml

* Handle backward-compat for unserializing previous SyntaxType serialized instances

* Fix @since
* Bulletproof to support passing null variants (especially for backward-compatibility)

* fix javadoc