The Arabic script is more common for publishing in this language,
but the Latin script is used occasionally, too.
The autonym ed-dārija was requested by the editors of
the incubator Wikipedia in this language, and I confirmed
that it's good with an external expert.
This addresses #74.
This is similar to #75 by SADIQUI.
Additional changes in this PR include,
* Added composer.json
* Refactored the folder structure.
* Added editorconfig.
* Added PHPCS and formatted existing code.
* Changes to use a single license - GPL-2.0-or-later
* ESLint related fixes
Bug: T218639