* Split arara into API, core and implementation packages.
* Refactored localization to use IETF BCP 47 codes.
* Added quite a number of rules and improved syntax.
* Rules now have a unique file name to be identifiable in a texmf tree.
* New ability to specify default preamble for files without directives.
* Added safe mode for disabling easily exploitable features.
* Removed arara shorthands (<arara>).
* Multiple bug fixes (exit codes, currentFile handling, ...)

See the full changelog of this release at
https://gitlab.com/islandoftex/arara/-/blob/development/CHANGELOG.md
